Nurse!

Madonna was horse collared and yanked off a riser onto a stage feet below ... all at the hands of a backup dancer.

The singer was performing Wednesday night at the Brit Awards in London, wearing an Armani cape with her back to the audience. The plan was for the backup dancer to dramatically pull the cape off of her as she revealed a sparkly outfit.

But before the pull Madonna was supposed to untie the cape strap around her neck. It was tied too tight and before it could be undone the backup dancer did his thing, pulling Madonna backwards neck first onto the stage.

She took a minute to collect herself and then went on performing.

It's the first time in 20 years Madonna performed at the Brit Awards.

9:45 AM PT -- Demi's rep says she returned home shortly after her ER visit and is "feeling much better."

Demi Lovato was hospitalized Tuesday for a nasty lung infection ... TMZ has learned.

We're told a friend took Demi to the ER at Providence Tarzana Medical Center because she was having significant trouble breathing.

Doctors did a bunch of tests and decided her problem was flu-related. They gave her medication, including a Z-Pak.

As of late Tuesday afternoon, we're told she was still at the hospital.

The timing sucked, because Demi is recording an album and she had studio time Tuesday with a big producer and she had to cancel.

Damon Wayans is postponing multiple tour stops after suffering a medical emergency related to his diabetes ... TMZ has learned.

The comedian was supposed to perform Saturday in Missouri, but sources close to Wayans tell us he's unable to fly right now because of his ongoing battle with Type 2 diabetes. He was diagnosed back in 2013.

The Kansas City Improv Theater says it got word Tuesday Damon wouldn't be able to perform -- and our sources say there are going to be more cancellations down the road. He's already dropped a six-show engagement in Buffalo next month.

Leonard Nimoy was rushed to the hospital after severe chest pains prompted a 911 call ... TMZ has learned.

Law enforcement sources say the legendary "Star Trek" star was transported to UCLA Medical Center last Thursday.

We're told paramedics weren't taking chances with Captain Spock and got him in front of a doctor ASAP. Nimoy's been in and out of hospitals multiple times in the last few months.

Nimoy announced he was suffering from COPD back in 2014, and even though he quit smoking more than 30 years ago ... he blames his illness on decades of lighting up.

We've reached out to Nimoy's rep for comment ... but no word back yet.

8:25 AM PT -- Gordon just tweeted a screen grab of a text he sent Bobby saying, "Man to man I love your daughter ... I don't know why you won't let me see her ... Your daughter is going to hate you when she wakes up. It's not like you know her anyways. What's her favorite color? What's her favorite smell, movies, food. You don't know. I forgive you she won't."

Nick Gordon is refusing to talk to cops about the circumstances surrounding Bobbi Kristina ending up face down in a bathtub, and he's refusing to tell Bobby Brown as well.

Bobby Brown's lawyer, Chris Brown, says Gordon has refused to cooperate by coming clean with the events that led to the medical emergency and there's no reason to talk to him anymore about giving him a hospital visit.

Brown says, "It appears that Mr. Gordon did not want his understanding of the facts to be subject to the truthful examination of various experts or Bobby Brown himself."

Brown continues, "Mr. Gordon has every right to remain silent and not share his version of events with Bobby Brown," adding, "Mr. Gordon is not as desperate to visit Bobbi Kristina as he wants the world to believe."

TMZ broke the story ... Nick became the target of a criminal investigation after authorities noticed injuries to Bobbi Kristina's body when she was taken to the hospital.

1:10 PM PST -- Cops tell us there was no damage to the Kardashian's vehicle -- a black Yukon GMC -- and a motor carrier service called the slide-off into police.

We're told the incident was part of a number of similar accidents that happened today due to the icy roads ... and the family was calm when cops arrived. No citations were issued.

Khloe Kardashian skidded on an ice-covered Montana road and dangerously crossed into oncoming traffic, eventually landing in a ditch with Kim, North West and Kylie on board.

We're told the girls were driving in Bozeman, MT Saturday morning when a semi-truck drove by their car and kicked up a ton of snow, hitting their windshield and apparently blinding Khloe.

Apparently Khloe couldn't see and began swerving, right into a patch of black ice. The car then spun out of control, crossing oncoming traffic and ending up in a ditch.

We're told cops came and everyone's ok.

The accident comes 2 weeks to the day after Bruce Jenner got in his fatal car crash.

Kim posted this pic on Instagram afterward ... seemingly making reference to the accident.

Ahmad Givens, a.k.a. Real, one of the stars of VH1's "Real Chance of Love" has died after a long battle with cancer ... according to his brother.

Real's brother Chance tells TMZ ... the reality star's condition worsened after he took a fall in January ... he was bedridden ever since.

We're told Real was having trouble with vision and speech Friday night during a family visit ... and they had a feeling the end was near. He passed away hours later.

As we previously reported ... the reality star was diagnosed with stage 4 colon cancer in 2013. Real underwent surgery and things were looking positive, but earlier this year the cancer returned and he began chemotherapy treatments.

Chance posted a tribute to his brother online saying, "I'll see you one day soon we shall dance again in God's kingdom forever and ever bro words can't describe my pain world pray for me!"

"American Horror Story: Freak Show" star Ben Woolf is no longer in critical condition ... but doctors say he still has a tough road ahead.

Sources close to the actor tell us Ben has yet to wake up ... and is being kept sedated while under constant doctor supervision -- but the upgrade to his condition is good news.

TMZ broke the story ... Woolf was hospitalized after he was struck in the head by a moving car.

Sources tell us his family has been by his bedside the entire time ... and "AHS" creator Ryan Murphy -- as well as other cast and crew from the show -- have sent flowers to his room.

"Walking Dead" actor Markice "Kesan" Moore tried to kill himself this week and explained why in a video ... TMZ has learned.

The actor -- who played a prison survivor in Season 3 -- was found unresponsive Tuesday morning at his Woodland Hills home by friends after ODing on a deadly mix of Xanax and Patron.

Moore was rushed to the hospital and placed on a 5150 psychiatric hold. He has been released and is undergoing therapy.

Moore recorded a suicide video in which he outlined his plan to end his life, telling his kids why he wanted to take such a drastic measure.

Moore's manager tells TMZ, he was distraught over his grandmother's recent death.

The actor -- who's also a rapper -- got his start on MTV's reality show "From G's to Gents."

"American Horror Story: Freak Show" star Ben Woolf is in critical condition after he was struck in the head by a moving car in Hollywood Thursday night ... TMZ has learned.

Law enforcement sources tell us ... the 4'4" actor -- who plays Meep and was heavily featured in the current season of the show -- was struck in the head by the mirror of a passing SUV as he crossed a Hollywood street. He was rushed to a nearby hospital.

Cops say they did not ticket the driver because Ben was jaywalking when he was struck.

As for Ben ... he remains in intensive care.

Suge Knight's body keeps rejecting court dates -- he was just rushed from a courthouse to a hospital ... and we've learned the problem is a stomach issue related to last summer's nightclub shooting.

Suge never made it into the courtroom for his robbery case. The judge announced that he'd been transferred from jail to the courthouse, but suddenly fell ill ... and had to be taken by ambulance to a hospital.

Suge's attorney David Kenner tells TMZ ... the rap mogul's been dealing with bleeding in the stomach. Kenner says he met with Suge Wednesday, and he was complaining about the stomach pain. He says there have been multiple ongoing heath issues all related to Suge getting shot six times at 1Oak Nightclub in August.

The medical emergency led to the 2nd delay in proceedings for the robbery case he and Katt Williams are facing. They're accused of taking a camera from a paparazzo in Beverly Hills.

The judge said Katt will be in court later Thursday to face the robbery charges.

June Fairchild -- the actress best known for her iconic Ajax snorting scene in "Up In Smoke" -- has died at 68 ... and friends are hoping her former Cheech & Chong co-stars can help with her funeral costs.

Fairchild had a big movie career in the '70s -- besides 'Smoke' ... she appeared in "Head" with The Monkees ... and "Thunderbolt and Lightfoot" with Clint Eastwood.

She's also widely credited for naming the band "Three Dog Night" ... while dating lead singer Danny Hutton.

June was put in hospice care over the weekend, and died Tuesday night after a long battle with liver cancer.

Sources close to Fairchild tell us her last few years were difficult financially. She'd been homeless for several years. We're told her friends are reaching out to Tommy Chong to see if he can pitch in for her funeral and burial expenses.

Bobby Brown's wife left Bobbi Kristina and her husband in Atlanta and flew to L.A., where she made 2 things clear ... they still have hope, and they want nothing to do with Nick Gordon.

Alicia Etheredge landed in L.A. Wednesday and told our photog their hope for Bobbi Kristina's survival is prayer. We asked about the doctors advising Bobby to make a decision on withdrawing life support, but her focus is God.

Alicia -- who is pregnant -- bristled when Nick Gordon's name came up. As we reported, Nick is now going public, trying to put pressure on the Brown family, to let him see Bobbi Kristina, but Alicia's reaction makes it clear ... he's persona non grata.

Bobbi Kristina's boyfriend Nick Gordon has been groveling to see her with no luck, and now he's publicly pleading for a visit.

Gordon's lawyer, Randall Kessler, says Nick's efforts to see Bobbi Kristina have been consistently blocked by the family. Kessler adds, "[Nick] has respected the family's wishes and for that reason alone has not returned to the hospital and risked a public confrontation."

As we reported, Bobby Brown's relatives have threatened to lay "hands on him" if Nick ever shows up.

TMZ broke the story, police have launched a criminal investigation because Bobbi Kristina was found with injuries on her body and Nick is the target of the probe.

Kessler adds, "He desperately wants to be with the one he loves and continues to hope that his request will be granted."

As we previously reported, we're told some of Bobbi Krisitna's organs are beginning to shut down and it is only a matter of time.

Bobbi Kristina's organs are shutting down and reliable family sources say at this point it doesn't matter if Bobby Brown withdraws life support ... she's dying.

As we reported ... when Bobbi Kristina was taken to the hospital 2 weeks ago her brain activity was minimal. A few days later she showed an improvement in brain function but we're told her condition has since deteriorated.

We're told several organs are already shutting down and the family now fully understands.

Bobby Brown is holding strong to his religious view and is saying he will do what it takes to keep his daughter alive, even if it's just on life support with no long-term hope. Some members of Bobby's family disagree with his decision but will respect it.

The night Drake released his new album, his dad had a very strange accident ... driving his luxury ride over a street sign and crashing into the side of a building.

Dennis Graham tells TMZ he was running errands in downtown Memphis around 8:30 PM Thursday ... when he accidentally hit the gas instead of the brake and smashed his Jaguar XK8 into an apartment building wall. No one was hurt.

Graham says the pedal mix up happened when his Timberlands got stuck under the brake, and he was trying to free them.

Dennis says the building manager wasn't there -- so he drove home, and returned to the scene Friday morning where cops were assessing the damage. They gave him a ticket for failure to maintain proper control.

We know what you're thinking -- and Dennis says he wasn't boozing. Total damage ... around $400 ... which he says insurance will cover. Drizzy Sr. adds, "I will never drive in those [shoes] as long as I live."