Nurse!

"The Wendy Williams Show" has been a revolving door this season as the host struggles with various ailments, and now TMZ has learned a "'permanent guest host" is about to be named.

Multiple sources with direct knowledge tell TMZ ... Sherri Shepherd will take the reigns of the show beginning in September. Our sources say the deal is almost locked, and everyone involved expects it will be inked in the very near future.

Now, here's the way it will work. The folks who produce the show will be monitoring Wendy's progress between now and September. If Wendy gets better, there's an open door for her to return. If, however, it appears she is unable to return, then they would change the name of the show as early as September ... which will mark the 15th season of the show.

Our sources say the Fox Station Group -- which carries the show on its owned and operated stations ... is on board with the move.

Wendy stepped away from her show back in October after suffering "serious complications" from Graves Disease as well as a thyroid condition ... this all coming after she battled COVID-19.

Wendy's last appearance on the show came in July 2021, when she signed off at the end of season 13, telling fans she'd see them for season 14.

That never happened, but the show has since continued to air with a multitude of guest hosts including Bill Bellamy, Whitney Cummings and Leah Remini.

Dana White shared some graphic photos of Kamaru Usman's open hand surgery on Monday -- and, WARNING, you better be done with breakfast before clicking on the pics!!

Usman had to head under the knife after he jacked up his hand in a sparring sesh just weeks before he beat Colby Covington at UFC 268 in November -- and the procedure was clearly no cakewalk.

You can see in the photos that White shared -- docs had to open up the top of Usman's right hand with some beefy utensils to repair the damage.

The before and after pics are gruesome -- they show docs cutting into the hand to fix it all up.

Despite the gnarly nature of the injury, White expressed optimism for a quick recovery -- saying in the caption that he'd see Usman "soon."

As for Kamaru, he posted a video from the hospital bed Monday ... clearly showing he ain't going to let the operation hold him back too much.

No official word on when the Nigerian Nightmare will return to action ... but his manager, Ali Abdelaziz, told us recently he'd like to see the fighter take on Leon Edwards next.

Comedian Heather McDonald fell hard during a show in Tempe, Arizona, but it was no joke ... it was a medical emergency.

Eyewitnesses tell TMZ ... the former "Chelsea Lately" star was headlining the sold-out show, when she delivered her second joke ... "I'm vaxxed, double vaxxed, boosted ... and flu shot and shingle shot and haven't gotten COVID and Jesus loves me most."

As soon as she delivered the joke, she just collapsed and hit her head on the floor. Everyone thought at first it was all part of the act, but it was not. She was conscious, but clearly, all was not well. An EMT and a nurse happened to be in the audience ... they rushed up on stage to provide first aid.

The 911 call came in as a seizure, but no one really knows yet. An ambulance came and paramedics tended to Heather.

Heather tells TMZ ... she felt somewhat dizzy when she was on stage and then just collapsed. She says it's never happened to her before.

She passed on the ambulance ... she says her sister-in-law -- who was in the audience -- took her to the hospital.

Heather says she got a cat scan as well as other tests, but so far it's unclear what caused her to faint. She says her head really hurts and she's very tired.

Ever the trooper, she says she feels horrible about abruptly ending the show.

Heather tells us she never had COVID and, as she said in her set, she's fully vaxxed and boosted.

We wish her well.

Billie Eilish brought her concert to a full-stop halt over one fan who appeared to be in distress -- and if you're thinking about Astroworld Fest here ... well, so was she.

The singer was performing in Atlanta Saturday, where State Farm Arena seemed to be packed to the gills with fans -- especially down below near where she was performing ... and where one gal apparently started getting crushed in the pit.

Check out this video we got of the moment BE paused everything once she became aware of what was going on ... it seems the lady in question was having trouble breathing, and needed an inhaler.

Luckily, Billie actually had one on hand ... and instructed the stage crew to get it to her ASAP. While the fan was being attended to, Billie settled down the crowd, told them to take a deep breath and step back -- at the same time, noting she wants to take care of her own ... something she's made sure to do in past concerts of hers as well, dating back years.

Then came a shot at what was clearly aimed at Travis Scott, with Billie saying ... "I wait for people to be okay before I keep going." That got huge cheers from the audience.

Of course, she's referencing the fact that Travis' November set continued for several minutes after the event was declared a mass casualty event -- with many suspecting TS was aware of what was going on. He's strongly denied that, claiming ignorance to the severity of things.

What's interesting here is the fact that Billie is replacing Travis at Coachella this year. Although an official announcement has yet to be made, the cat's outta the bag -- he got bumped amid the controversy -- other headliners dropped out too, FWIW -- and BE's one of the new artists who've been tapped in their stead.

Odell Beckham came through with an amazing gesture for a man fighting cancer ... by sending a personal message of encouragement during his challenging time.

TMZ Sports is told ... 43-year-old Dominic Tafuri is a former MMA fighter and current officer with the Essex County Department of Corrections in NJ.

Dominic also worked for Odell's go-to guy for bling, Gabriel the Jeweler ... delivering pieces to some of the biggest athletes around the world -- from Aaron Donald to Prince Boateng to Ederson.

Tafuri recently found out he had Stage 4 lymphoma after undergoing a routine ACL surgery ... and is now battling the disease head-on.

We're told Tafuri is like a brother to Gabriel, so the jeweler hit up OBJ and asked him to improve Dominic's spirits ... and the Rams star delivered!!

"Dominic, what's going on, man? OBJ here, bro," Odell said in the video. "Just wanted to reach out to you, send some love your way."

"Just stay encouraged, man," he added. "Stay prayed up, man. Just know I'm praying for you, and just wanted to send some love, bro. Stay up."

FYI -- there's a GoFundMe set up to help Dominic and his family during this time ... with a goal of raising $100k.

A man has been tracked down and arrested in connection to the SoFi Stadium parking lot fight that left a man hospitalized in a medically induced coma, officials say.

Inglewood mayor James Butts Jr. announced the new development on Thursday ... saying a Montebello man was traced to his home using surveillance footage that started in the SoFi lot.

Butts claims the footage shows 40-year-old Daniel Luna allegedly pushing a man in a Rams jersey from behind. The man who was pushed then retaliated, the mayor says -- shoving Luna and punching him in the face.

Butts says Luna fell to the ground ... and that's where he remained until he was found by a stadium employee.

As we previously reported, officials were criticized for seemingly dragging their feet in sharing the news about the attack ... with some believing it was to prevent a PR nightmare prior to the Super Bowl.

SoFi Stadium released a statement on the beatdown ... saying, "We are aware and saddened by the incident. Our thoughts are with Mr. Luna's friends and family during this difficult time."

"We are working with law enforcement officials in their investigation.''

The 49ers also released a statement ... saying, "What happened to Daniel Luna is reprehensible and we strongly condemn all violence."

"We know local authorities are conducting a full investigation and we're here to support them however we can."

"Our thoughts and prayers go to Mr. Luna, his family, friends, and the medical team providing him care.''

The identity of the person -- and the charges they were booked on -- are not yet clear.

Kevin Smith says there were 2 main factors in his decision to stop consuming animal products ... his near-fatal heart attack, and his daughter's master plan.

We got the director leaving Crossroads Kitchen in L.A. -- one of the most famous vegan joints in town -- and asked him if the vegan lifestyle is the secret to his vastly improved fitness.

Kevin's looking pretty good these days, and he explains how he made some big changes in his life after suffering that massive heart attack back in 2018.

He says after learning he had a full blockage in a major artery -- which caused the widowmaker heart attack -- he sat down with a nutritionist, and finally followed his daughter, Harley, to the vegan side.

Kevin, who initially thought he was having a reaction to spoiled milk when he had the heart attack, is only eating plant-based products these days and he tells us why he'd never followed Harley's lead before.

The way Kevin explains it ... she was pretty Machiavellian about it, but he's grateful she was.

There's new alleged video proof that supports a man's claim he was injured during a Jet Ski stunt gone wrong involving "Jackass" stars Steve-O and Chris Pontius.

TMZ broke the story, Michael Vicens-Segura is suing the veteran stuntmen for an incident he says, left him badly injured, suffering a gash on the side of his head.

In the video, you can see Vicens-Segura in the water between the vessels just before they take off, once the Jet-skis moved, Vicens-Segura was allegedly struck by the cable connecting the two when it snapped.

The aftermath is intense, and Michael is clearly in a lot of pain.

Michael says the whole thing happened in Puerto Rico in 2018 when the two guys and movie producers planned to do some kind of "Jet Ski Tug of War" ... which basically meant two guys would operate the jet ski in opposite directions.

Michael's attorney, John Phillips, now says ... "We provide this video looking for witnesses and people who know about the creation and execution of this stunt. If you have information, please contact us."

Vicens-Segura says he had to get a metal plate in his head and his life has been completely changed by the incident ... he is asking for more than $12 mil in damages.

Scary moment during a WWE NXT UK match Thursday ... Blair Davenport suffered a gnarly leg injury after she jumped off the top rope and landed on the ground awkwardly.

Davenport was competing against fellow wrestling star Meiko Satomura in a Japanese Street Fight for the NXT UK Women's Championship ... when disaster struck.

During the match, Blair climbed to the top of a ring post, jumped, and then slammed her feet onto the back of Meiko, who was outstretched on the apron.

But, when Davenport hit the ground just after that, you can see in video, her ankle and knee crumpled below her body.

Davenport was hurt so badly, she screamed in pain. The ref then immediately ended the match.

"This is really hard to see," one announcer said. "When any competitor gets hurt, regardless of how physical this match was, it's tough to watch."

Satomura -- the reigning champ -- looked concerned the entire time while Davenport received assistance from the medical staff.

Blair posted an update on her Twitter account following the match ... showing a picture of her on crutches and in a walking boot.

"Whoops😬 BRB ✌" she said.

Steve-O and Chris Pontius are responsible for a 'Jackass'-style water stunt that left a man with a busted up head and a ruined life ... at least according to a lawsuit filed by the guy who claims he was injured.

The veteran stuntmen are being taken to court by Michael Vicens-Segura, who says he was approached by them back in 2018 to see if they could use his jet ski for a project they were filming in Puerto Rico.

Vicens-Segura insists the guys wanted to use it for a 'Jackass'-y feat -- where 2 guys are in the water on jet skis, facing opposite directions ... and attached to one another by a bungee cord, to see who would get yanked off first as they sped off.

Essentially, it's a jet ski tug of war ... and Vicens-Segura says the 'Jackass' guys have done something similar in the past -- in their movie, no less. It was called the BMX Tug of War.

Now, per the lawsuit, filed by attorney John Phillips and obtained by TMZ, Vicens-Segura was asked to hold one of the jet skis steady in the water because of the waves that day ... which he says he did. He claims, as Steve-O and Chris hit the gas, Steve's bungee cord snapped off the harness attached to his back ... which he says then flung in his direction and popped him hard on the side of the head, resulting in a massive gash.

Vicens-Segura says he had to be helicoptered to a hospital for emergency surgery, and even needed to be placed in a medically induced coma because he had a fractured skull and brain bleeding, among other things.

After several medical procedures, Vicens-Segura claims he was left in bad shape as he recovered ... and also had some pretty gnarly scars. He claims he's lost his ability to work, to think straight ... and continues to experience pain, suffering and agony because of what happened to him.

Of course, he's blaming Steve-O, Chris and others for the whole thing ... suing them for negligence and moreover the alleged incident. He's asking the court for more than $12 million in damages.

Lisa Vanderpump's hubby, Ken Todd, says the 'RHOBH' star will likely never ride a horse again ... after her last ride ended with a badly broken leg.

We caught up with Ken on Tuesday, just as Lisa was having surgery to repair the shattered bones. Ken confirms she broke her leg in 3 places, and will have a bunch of new hardware by the time you're reading this.

He says he's not completely sure how long it will take Lisa to fully recover, but he's guessing about 8-10 weeks.

One thing at least he's sure of ... LV's riding days are over. Ken says the horse she was riding Sunday was a gentle and amazing animal, and despite the ol' saying, it doesn't sound like he wants his wife to risk it by getting back on the horse. Of course, we'll have to see what Lisa thinks once she's recovered.

As we've previously reported, the 'Real House Wives' star was riding in L.A. when her steed apparently got scared, reared up and bucked her off.

Ken saw it happen, and was in complete shock -- he says Lisa immediately knew something was broken.

Simon Cowell did it again ... he crashed his e-bike and landed in the hospital with broken bones.

Sources tell TMZ ... Simon was tooling around on the bike in London last Thursday when he turned a sharp corner ... or at least he tried to turn. The road was wet and the tires went out from under him and he crashed to the ground.

We're told Simon broke his left arm and badly bruised his cheek. He may have also have suffered a concussion.

Simon went to the hospital where he was treated and released the same day, sporting a bright yellow cast.

As we reported, this was not Simon's first crash ... in August, 2020, he got a brand-spankin' new e-bike and literally got on it in his driveway and it lunged forward, crashing and as a result, Simon broke his back in 3 places.

Now, if Simon happens to read this ... wear a helmet, dude!!! He wasn't wearing one in either crash, and but for the grace of God, he could have suffered way more severe injuries.

The 2022 Olympics haven't begun yet, but they're already off to a not-so-hot start for USA skier Kai Owens, who sustained a gnarly eye injury during preparation for the Beijing event on Tuesday.

The 17-year-old Owens was practicing for the Winter Olympics at Genting Snow Park in China ... when photographers captured her falling on the slopes.

Kai needed medical care from personnel on hand ... but, fortunately, she was able to stand up on her own. Photos from the scene, though, showed she did suffer a black eye in the fall.

Thankfully, it does not appear she sustained any further serious injuries.

It's not exactly the start Owens was hoping for ... remember, she told us out at LAX just a few days ago that she was pumped for the Games, particularly considering the location of it all.

Owens was abandoned by her birth parents in China as an infant and was adopted by a Colorado couple when she was 1 year old.

Lisa Venderpump got thrown for a loop on the horse she was riding ... and she ended up in the hospital with broken bones.

'The Real Housewives' star was riding her horse Sunday at The Paddock in the Los Feliz part of L.A., when the equine apparently got spooked, reared up and bucked her off. An eyewitness tells us she flew over the horse's head and landed squarely on her back.

Lisa was in a lot of pain, and for good reason ... we're told she broke her leg in 2 places, just above the ankle. She also has bruising on her back.

She was taken to the hospital by ambulance. Hubby Ken Todd followed behind and he's with her at the hospital now. We're told she'll undergo surgery. Our Vanderpump sources say once she's all healed, she'll be fine.

The horse is no stranger to Lisa ... they've been together for 6 years. Some friend!!!

Dr. Oz drew on his medical background for a medical emergency at a political meeting ... jumping in to help a man who fell unconscious.

Sources close to the situation tell TMZ ... Oz was next in line to speak at Saturday morning's Pennsylvania Republican Caucus Meeting outside Pittsburgh when suddenly a state committee member collapsed.

We're told Dr. Oz rushed over and quickly lowered the man to the ground ... tending to him while he appeared to suffer a seizure and lost consciousness.

Our sources say Oz also helped move the man to a flat surface outside the meeting room, where another seizure-like episode occurred.

We're told EMS eventually arrived and transported the man to a local hospital, and the guy was conscious and conversing with Oz as EMS took him away.

Our sources say Dr. Oz went on stage for his scheduled remarks after the incident ... and following the caucus, he got in touch with the man and learned he's in stable condition at a hospital.

As you know ... Dr. Oz is running for a U.S. Senate seat in Pennsylvania, switching gears to politics after a successful career as a TV doctor.

Dr. Oz tells TMZ ... "I am a doctor first and always will be, so I responded immediately to a call for help when a nearby man collapsed. Following the lessons learned from a life in medicine, I did my job until EMS arrived to transport him to a nearby hospital."

NHL star Nathan MacKinnon suffered both a broken face and a concussion from the violent hit that left him a bloody mess on Wednesday night.

Avalanche head coach Jared Bednar just announced the update to media members ... saying he's not sure when the Colorado center will be able to return to game action.

Bednar did say, though, that he expected MacKinnon to miss at least the team's next 3 games.

If you missed it ... the hit was scary as hell -- as MacKinnon was going up the ice in the Avs' game against the Bruins, Taylor Hall's shoulder collided with his face.

Video of the play shows MacKinnon's stick ended up wacking him in the nose ... 'causing him to bleed everywhere.

Somehow, MacKinnon got up and skated off the ice under his own power.

Colorado will miss the star while he's out ... he's been one of the best players in the league this season, tallying nine goals and 34 assists in 31 games.