Nurse!

7:50 AM PT -- Simon actually fell backwards down the stairs. We're told he had already gone to the kitchen, and was on his way back upstairs when he fainted and tumbled.

Simon Cowell was rushed to a hospital early Friday morning after falling down a flight of stairs.

We're told Simon was asleep in the upstairs bedroom of his London home. He woke up in the middle of the night, felt dizzy as he tried to go downstairs to the kitchen for some milk. We're told he fainted and tumbled to the bottom of the staircase.

An ambulance came, put him in a neck brace and neighbors saw Cowell placed in the back of the ambulance on a stretcher.

We're told doctors have performed a CAT scan and more tests are being performed.

He's in stable condition and still in the hospital.

Simon's girlfriend/baby mama Lauren Silverman was in New York visiting her son and is currently on a plane flying back to London to be with Simon.

Tom Hanks and Mary-Louise Parker sprang into action when a moderator's nose started bleeding onstage -- Tom distracted the crowd while Mary-Louise played the more pragmatic role.

The hilarious/awkward incident went down Wednesday night at The Plaza Hotel in NYC at a benefit dinner for the David Lynch Foundation. It happened fast -- it was just 3 minutes into the chat when the head of the foundation, Bob Roth, started gushing blood.

Tom and Mary-Louise -- there to talk about transcendental meditation and how it can help veterans suffering from PTSD -- did what they could: Tom took the stand-up comic route while Mary played the role of nurse.

Joe Theismann says watching Gordon Hayward's leg snap during NBA's opening night took him right back to 1985 ... an eerie reminder of that fateful encounter with Lawrence Taylor.

Of course, LT snapped Theismann's leg live on "Monday Night Football" -- essentially ending Joe's career. It remains one of the most gruesome injuries of all time.

Theismann tells TMZ Sports he really does understand Hayward's pain -- and feels terrible every time he watches a similar injury on TV.

The good news ... Theismann says he's optimistic Hayward can recover and go on to have a strong career in the NBA -- as long as he follows two important rules.

Jesus Campos, the Mandalay Bay security guard who alerted police to the Las Vegas shooter, is speaking out for the first time about the violent encounter that left him with gunshot wounds.

Jesus opened up to Ellen DeGeneres ... detailing the harrowing moments leading up to him discovering Stephen Paddock on the 32nd floor, just as he was starting to open fire on the crowd of concertgoers below.

He thinks a loud slamming door during his routine check of the floor is what tipped off his location to Paddock, who then started shooting into the hallway -- and hit Campos in the leg.

Elvis Presley Enterprises runs a disease-infested hotel where the water is full of bacteria infiltrating guests' lungs ... according to a new lawsuit.

The company that runs all things Elvis has just been sued by Jennifer Walker, who says she stayed at the Guest House at Graceland this summer -- and contracted Legionnaires' disease during the vacay.

Walker says she spent a lot of time at the hotel pool and hot tub and started suffering symptoms of the chronic lung affliction -- such as coughing, difficulty breathing and loss of appetite -- and was diagnosed with Legionnaires' later that same month.

According to the suit, a county health department investigation of the hotel -- which is right next to Graceland -- found the sprinkler system tested positive for Legionnella bacteria.

There have been other deaths allegedly tied to an outbreak at the hotel, and EPE is already facing a wrongful death lawsuit.

Walker is suing for negligence and wants an unspecified amount in damages. To be clear, she is not suing Elvis' estate or the actual Graceland property.

Gerard Butler was hospitalized after he says he got run off the road and took a bad spill on his bike.

Sources close to Butler tell TMZ ... he was riding his motorcycle in L.A. when he got cut off by a car, causing him to crash. Someone called 911, paramedics came and took Gerard to a nearby hospital where he was treated for his injuries. Lucky for him ... no broken bones ... just cuts and bruises.

Lucky for Gerard he's not laid up. His climate change disaster flick, "Geostorm," comes out next week, and he's able to promote it like usual, despite being a little banged up.

Artie Lange never made it to his show in Ohio this weekend -- but ya can't blame the guy ... he stayed grounded on doctor's orders.

Sources close to Artie tell TMZ ... he wasn't feeling well Saturday ahead of his comedy show in Akron, Ohio because of high sugar levels. We're told he suffers from this due to his diabetes.

Rather than risk further injury by taking a flight from his home in New Jersey to Ohio, we're told Artie followed his doctor's instructions to hit a hospital and skip the show. Sources say Artie had a bad reaction the last time he flew with high blood sugar, so it was a no-brainer.

Tom Keifer had to cancel a concert this weekend 'cause he was rushed to a hospital -- but the good news is he's making it up to fans ... TMZ has learned.

The Cinderella frontman's rep tells TMZ ... Tom collapsed prior to his show Saturday in Warrendale, PA and was rushed to a hospital. Tests found he was experiencing severe dehydration and heat exhaustion ... which put him out of commission and kept him there overnight.

We're told docs found Tom to be in stable condition and he's been given fluids through the night. He's expected to be released from the hospital Sunday -- and even better ... he plans to revisit his show in Warrendale later this week.

Looks like he'll be back on solid ground soon enough.

Tamar Braxton is in the hospital fighting the flu and had a bad reaction to her flu meds ... TMZ has learned.

We're told Tamar started feeling ill earlier this week while promoting her new album, "Bluebird of Happiness," in New York. She bowed out of several public appearances because she could barely speak, prompting her to see an ear, nose and throat doctor.

She was prescribed Prednisone, a steroid for her throat, but her body had a horrible reaction and swelled up. The swelling was so severe once she returned to L.A. she was rushed to the ER on Wednesday night.

Tamar later posted a picture from her hospital bed with her hospital band asking for prayers. We're told she's expected to stay in the hospital for a few days until she makes a full recovery.

Get well soon!

All you kids with dreams of impressing millions of YouTube followers with your sensational above the rim antics ... PLEASE WATCH THIS, and realize sometimes gravity wins.

Russian super dunker Illia Kroshka took a major L when he tried to dunk over a car during a recent contest, not quite clearing said car and TOTALLY EATING IT.

To his credit, Krosh posted the footage on social media for everyone to see ... so at least he's proving there's no shame in his dunk game.

BTW -- the dude is pretty sick. If you don't believe it, watch below.

Marilyn Manson's concert in NYC just came to a scary abrupt halt when 2 giant gun props came crashing down on him ... sending the rocker to the hospital.

Manson was reportedly about an hour into his show at the Manhattan Center Hammerstein Ballroom -- performing his hit "Sweet Dreams (Are Made of This)" -- when the stage prop fell on top of him.

According to various reports ... it took several minutes for emergency workers to get Manson out from under the props, and he was put on a stretcher and taken to the hospital.

No word yet on the rock star's injuries, but the rest of the show was obviously canceled.

Here's another view of the incident ... starting around the 2-minute mark.

9/27/17 -- The person detained has been confirmed as 36-year-old Corey McClendon

2:50 PM PT -- LAPD has already detained one person in connection with the shooting.

Young Dolph was just shot in Hollywood and is being rushed to a local hospital ... TMZ has learned.

Law enforcement sources tell us the rapper was just outside Shoe Palace at the famous Hollywood and Highland intersection when he was hit ... officers were nearby and responded immediately.

At this time, no arrests have been made and it's unclear how many people may have opened fire.

We're told he suffered multiple gunshot wounds but his injuries appear to be non-life threatening at this time.

It's not the first time this year the rapper's come under gunfire ... back in February his SUV was shot at over 100 times while he was in Charlotte, N.C. Blac Youngsta turned himself in for the shooting in May after a warrant was issued for his arrest.

Story developing ...

Let's just say Tony Orlando will NOT be knocking three times on a ceiling anytime soon -- not with his left hand, anyway.

The '70s pop star -- who sang 'Tie a Yellow Ribbon' and "Knock Three Times" -- sliced the tip of his middle finger clean off in a garage door accident at his home in Branson, Missouri.

Tony's son, Jon, tells us he was calm and collected -- way more than you'll be when you see the damage. He found the tip of the finger, picked it up and drove himself to a hospital ... like a boss!

We don't know yet how the surgery turned out, but gotta say ... his manicurist is gonna be pissed.

Scoring backstage passes for Chance the Rapper was the worst VIP experience ever ... according to a fan who's suing for a header she took during the Chi-town concert.

The woman says she had a wristband for meet and greet access to Chance during his 2016 Magnificent Coloring Day Festival. Sweet score, right? Wrong ... according to the fan who says she was on her way backstage when she tripped over a chain that was left unsecured, and on the floor of a tunnel.

She says she was slammed to the ground and was injured, though she's not specific about her boo-boos.

In the suit, she says the concert promoter, AEG Live, had a duty to keep the grounds safe ... but failed miserably. She's suing the music giant for damages.

Chance is not a defendant in the case.

UFC superstar Luke Rockhold kicked so much ass this weekend, his foot exploded.

Well, it certainly blew the hell up.

Take a look at video of Luke's insanely swollen and bruised right foot -- which he earned during Saturday night's dominant TKO victory over David Branch at 'UFC Fight Night' in Pittsburgh.

Maybe put some ice on it?

The good news ... Rockhold seems pretty comfortable recovering while chillin' at a rooftop pool in the Steel City.

Could be worse ... could be David Branch's face.

10:26 AM PT -- A rep for Andrea says the singer hit his head during the fall but is back home and doing very well.

Andrea Bocelli had a scary fall off a horse in Italy ... and had to be rushed to a hospital by helicopter.

Bocelli was riding the horse Thursday near Pisa when he fell. It's still unclear how the accident happened, but he was airlifted to a hospital. One positive sign ... he tweeted to fans, saying, "I feel great. It was just a trivial fall from a horse."

The helicopter ride makes us think he's downplaying this somewhat.

Despite being blind, the Italian tenor famously leads a very active life -- we've seen him windsurfing, skiing and bike riding over the years.

Story developing ...