Nurse!

Rapper YG was shot early Friday morning at an L.A. recording studio ... TMZ has learned.

Law enforcement sources tell us, it happened at around 1:45 AM in Studio City. We're told someone shot YG 3 times in the hip.

Somehow the rapper was able to get in his car and someone from his group drove him to a nearby hospital.

Cops were called and found multiple shell casings and blood on the sidewalk. Police went to the hospital to interview YG but we are told he was "very uncooperative."

YG's rep says the injuries are not life threatening, and he's doing fine.

We're told the shooter is still on the loose.

Former action star Ernie Reyes Jr. -- who famously played Keno in "Teenage Mutant Ninja Turtles II" -- is "fighting for his life" after suffering from kidney failure ... this according to his family.

Reyes Jr. was huge back in the day -- starring as Tai in "The Last Dragon," Prince Tarn in "Red Sonja" ... and he was the main character in "Surf Ninjas."

He later transitioned into MMA -- and went 3-0 in Strikeforce.

Now, 43-year-old Reyes Jr. is hoping for a kidney transplant after his own began to fail back in March. Since then, he's been in and out of the hospital in Texas ... and his eyesight is failing.

Ernie's sister tells TMZ Sports ... Reyes is in the process of getting on a transplant list -- but in the meantime, he's been receiving dialysis treatments 3 times per week.

We're told the family has set up a fundraising page to help with medical bills and several folks from his films and TV shows -- like stunt coordinator pals James Lew from "Rush Hour 2" and Andy Cheng from “The Rundown” -- have pitched in.

Get well soon, man.

Caitlyn Jenner's flaunting the handiwork of her plastic surgeons -- posing with one of the docs who was crucial to her transformation.

Caitlyn and Dr. Harrison Lee held up the now famous Vanity Fair cover shot for the pic. As Caitlyn said in the VF article ... she underwent 10 hours of surgery in Beverly Hills to feminize her face.

She autographed the mag for Dr. Lee -- saying, "Great job. Thank you so much."

Slim Jimmy is sure he'll bounce right back from his horrifying leg injury -- and while his confidence might be sizzurp-fueled ... he also thought he might die on stage when it first happened.

Slim and Swae Lee were on TMZ Live on Tuesday, and Slim described the moment he toppled into a spotlight, slashed his leg and toppled over during a show in NYC last weekend.

The guys were their usual light-hearted selves, but Slim got serious about the pain -- and then Swae quickly cracked a joke ... about his partner sipping on sizzurp (codeine cough syrup) during his hospital visit.

Check out the clip -- Slim thinks he'll be game ready within about 10 days. Mentally, he's already good-to-go ... these guys are awesome.

Danny Trejo emerged unscathed from a gnarly looking car crash Tuesday afternoon -- and he's blaming a little old lady for causing the wreck.

Trejo tells TMZ he was driving in Chatsworth, just north of L.A., when a woman (he's guessing around 70 years old) made an illegal left turn in front of him. DT's sweet ride -- a Caddy El Dorado -- crashed into her car, and she ended up getting the worst of it.

Trejo, who is 71-years-old himself ... says there's little damage to his car, but hers got torn up. More importantly to the "Machete Kills" star ... he says no one was injured, they exchanged info, and went about their way.

Trejo was in such good spirits after the crash, he posed with paramedics and police.

12:17 PST: Law enforcement sources tell TMZ ... Charlie was taken by ambulance to a local hospital after complaining of chest pains. He was treated for dehydration and released after an hour and a half.

Charlie Sheen had a medical emergency Monday night ... paramedics were called to his home after getting a call the actor had a bad case of food poisoning.

We're told Charlie (or one of his people) called the fire department directly at around 11:00 PM Monday. It's curious why they didn't call 911 directly, which by the way, automatically records the conversation.

Sheen's people tell TMZ it was nothing more than a really, really bad case of food poisoning and the actor was treated in his home and that was that.

We're told Charlie's doing fine.

A contestant on "The Island with Bear Grylls" set aside his own survival instincts to lock lips with an endangered sea turtle to bring it back from the dead.

On Monday night's episode, hungry contestants accidentally trapped the turtle in one of their fishing nets, and found it drowning.

Normally on a 'Bear Grylls' show, wildlife be damned when it comes to survival, but this sea turtle is a protected species, so instead of turning it into soup ... they gave it CPR, and shockingly ... it worked!

After a few puffs the turtle seemed to slowly creep back toward the ocean.

A member of Rae Sremmurd literally had his performance cut short when he tore open his leg on a jagged piece of glass -- the video of the accident is gnarly, but his injury is super GNARLY!

It all went down at the Governor's Ball in NYC on Friday ... the "No Flex Zone" duo was slaying when Slim Jimmy jumped from a speaker on to a spotlight, which toppled over. Slim's leg got sliced ... apparently by the shattered lens.

During the ambulance ride ....Slim took a ridiculously gruesome shot of his leg, and then decided to post it. We'll just say -- viewers beware.

Before leaving the venue, Jimmy got on the mic and told the crowd, "I got a big ass piece of glass in my leg, so if you got that video, put that sh*t on Instagram."

Well done, audience.

A former NFL lineman has a STERN WARNING for Kyrie Irving ... don't let the doctors pressure you into coming back early ... or you could wind up with an OBLITERATED KNEE!!!!

The man behind the warning is LeCharles Bentley ... a former 2-time Pro Bowler who played for the Cleveland Browns ... who suffered a pretty major knee injury of his own during his playing days.

As for Kyrie -- the Cavs said he'd been suffering from a "bad case of tendonitis" over the past few weeks and wanted him to play last night. Kyrie's father had reportedly been pushing for Irving to take it easy.

Enter Bentley ... who added his perspective on social media after the game:

"So the doc tells Kyrie it's 'just tendonitis' ... Yea, I tore my patella from having 'just tendonitis'. I tried to 'tough it out'... ."

He then posted a picture of what his knee looks like now -- and said, "Oh, 'it just tendonitis'... I'm out, about to go 'tough out' this leg workout. Could be worse! #Blessed."

Bottom line -- Bentley says, "Athletes better listen to their bodies, not Twitter & Docs."

Nichelle Nichols -- best known for playing Lieutenant Uhura in "Star Trek" -- was rushed to a hospital Wednesday night after suffering a mild stroke.

A rep for Nichols tells TMZ ... she's awake and resting comfortably at an L.A. hospital. The 82-year-old was taken by ambulance from her home Wednesday night.

Doctors are conducting tests to determine the severity of the stroke.

Nichols appeared on both the "Star Trek" TV show and six of the movies, the last one being "Star Trek VI: The Undiscovered Country."

Via her Facebook page, a rep for Nichols said her CAT scan came back negative and they are awaiting the results of her MRI. The rep added, "Currently she is awake, eating, in good spirits and able to have full conversations. Her right side has shown minor signs or mobility loss but she is not showing any signs of paralyses."

That drone accident jacked up Enrique Iglesias' hand so badly he has to get reconstructive surgery.

Enrique's fingers got sliced during Saturday night's concert in Tijuana when he grabbed a drone flying above the stage. Even though the singer was able to finish the show -- bloody and bandaged ... the damage was severe.

His rep told the AP ... Enrique was having surgery in L.A. on Monday to repair his right hand.

His world tour will resume July 3rd in Mexico City, where we're guessing drones will be strictly prohibido.

Enrique Iglesias was seriously injured when he grabbed a drone that was buzzing during his concert.

It happened Saturday night in Tijuana, where Enrique was performing to a crowd of 12,000. The drone is part of the concert. He sometimes grabs it as it flies around, showing the audience his POV.

But this time he grabbed the wrong part, and the drone sliced into his hand. He went to the side of the stage for help, and he was advised to pull the plug on the concert and get immediate medical attention. But Enrique went on for 30 minutes, with a blood-soaked t-shirt.

The singer was rushed to the airport where an ambulance was waiting to give him first aid. He then flew to L.A. to meet with a specialist.

Brave new world.

Lil Boosie first heard big cheers from a NYC crowd, and then huge groans .. because fans watched him vomit on stage -- and he tells us it's all because he lost some very important medication.

Boosie -- a known diabetic -- says there was a miscommunication during his travel, and the bag with his meds went to Philly ... while he went to New York. He went on stage last night without getting his insulin shot.

He wants his fans to know everything's cool now -- he's got his Rx, and is on his way to Nebraska to tear down the stage.

Suge Knight's gotta be running out of sick days by this point -- the accused murderer refused to leave his jail cell, and forced a judge to postpone his hearing for an alleged robbery.

Knight, who's sitting in jail awaiting trial for murder, told jailers he was too sick to go to court on Wednesday morning. He and comedian Katt Williams were scheduled to have a hearing for their alleged robbery of a paparazzo in Beverly Hills.

Knight's had numerous medical issues -- including a fainting spell -- in courtrooms and in the jail since he was arrested for allegedly murdering Terry Carter by driving his truck over him.

Karrueche Tran's bloody lip and vague caption might have you believing something seriously physical went down a certain someone in her life ... but TMZ has learned that just isn't the case.

KT posted the photo Tuesday afternoon with the caption, "Rough day in Chicago." While it seems like a bad domestic violence joke -- we're told she was actually referring to a photo shoot she just did in Chi-town.

Our sources say the spread called for Karrueche to play a "street fighter" type, thus the blood.

So, despite her ex-bf temporarily overreacting to her pic with Tyson Beckford -- this fight club snapshot was strictly a work thing.

****WARNING: Video contains graphic language*****

Roger Daltrey damn near shut down The Who's latest concert because someone was smoking marijuana, and video of the incident is graphic -- for its severely un-rock and roll nature.

During Wednesday night’s show on Long Island ... the Hall of Fame frontman stopped singing three songs in so he could berate a fan whose weed smoke was bothering his voice. His bandmate Pete Townshend joined in, screaming at the toker ... “eat it up your f***ing arse.”

At first glance, this is shocking behavior for The Who -- once dubbed the loudest band in the world. But we're told by fans who attended, there was a huge anti-smoking announcement before the concert. So everyone knew the deal.

Plus, Daltrey's had multiple procedures on his throat -- and the tour was even postponed when he got a throat infection in December.