Nurse!

Billy Joel says he's been diagnosed with a brain disorder ... and as a result, he's canceling all of his scheduled concerts.

The singer announced Friday he is suffering from Normal Pressure Hydrocephalus ... which is a brain disorder where excess fluid accumulates in the brain's fluid-filled cavities.

Billy says his condition has been exacerbated by his recent concert performances ... and he's having trouble hearing, seeing and balancing.

Stanislav Yanevski -- a star in the 'Harry Potter' films -- is recovering from emergency surgery ... after he was rushed to the hospital with an "inability to breathe."

The actor shared the news on Instagram early Friday morning ... posting a picture of himself lying in a hospital bed, a bandage wrapped around his nose and an IV sticking out of his arm.

Yanevski -- who goes by "Stan" on his social media -- thanked his fans for all their happy birthday wishes and other good tidings ... promising people have made him feel special and supported as he turns 40.

Blood was shed during Game 2 of the Western Conference Finals on Thursday ... but we're not talking about any Timberwolves or Thunder players -- it was referee Scott Foster who was left worse for wear!!

The accident happened just over a minute into the contest -- during a jump ball between Lu Dort and Julius Randle. The former's arm came down and hit Foster right in the nose ... and he started oozing.

The longtime official -- who also appeared to take a bit of a kick to the gut from Randle -- rushed over to the scorers booth for a towel ... and got his nostril plugged up.

WWE Superstar Zoey Stark left "Raw" on Monday night in absolute agony ... after she sustained a devastating leg injury during a match.

The gruesome scene unfolded out at Bon Secours Wellness Arena in Greenville, South Carolina ... when Stark was battling against Rhea Ripley and Kairi Sane in a Money in the Bank qualifier.

The trio put on a show for the crowd -- but things took an awful turn when Stark jumped from a top rope and landed awkwardly on her right leg.

Drake's hoping to garner some support for his pal Tory Lanez's release ... sharing a petition calling on California Governor Gavin Newsom to pardon him.

The rapper took to Instagram Friday night to share a change.org link with the caption "@torylanez come home soon" ... and, the link led to a petition calling on the governor to "Correct a Deep Injustice" and pardon Tory.

According to the petition, Tory's conviction wasn't supported by enough physical evidence ... and, they feel the justice system straight up railroaded the guy and landed him a 10-year sentence.

One of Cassie's bombshells in Diddy's federal trial is her claim he suffered a 2012 drug overdose following a Playboy Mansion bash, and we've got hot shots from the fateful, celeb-packed event.

Cassie told the jury Thursday about the couple's on-and-off use of opiates over the course of their tumultuous years-long relationship, and she specifically referenced a wild night in February 2012.

She said, on that day, the couple had a freak-off, then went to a sex club in San Bernardino -- about 2 hours east of L.A. -- and later, Diddy went to the Playboy Mansion without Cassie.

5:52 PM PT -- Sonja Morgan is explaining why she left a restaurant in Florida in an ambulance.

The 'RHONY' star tells PEOPLE in a statement ... "An elderly patron at the restaurant I was dining at appeared to be in distress, and I called for medical assistance. While assisting during the commotion, I sustained some minor injuries and, out of an abundance of caution, accompanied the EMTs to be checked out."

Sonja's statement continued ... "I'm incredibly grateful to the first responders for their swift care and professionalism."

She is also responding to our report that she was given a trespass warning from police ... telling the outlet, "I didn't want to leave. I insisted on making sure she was cared for."

1:10 PM PT -- Sonja Morgan was given a trespass warning last night, according to documents TMZ obtained from the Palm Beach Police Dept. She refused to sign the warning, the doc shows.

Sonja Morgan took an unexpected ride to the hospital last night ... and we have footage of her about to be whisked away.

Check it out ... our video shows "The Real Housewives of New York City" alum seemingly upset while loudly speaking to responding officers at Echo in Palm Beach, Florida, Thursday evening.

Sources tell us she chatted with Palm Beach police officers and restaurant staff for about 15 minutes before she hopped on the stretcher and was loaded into the back of an ambulance.

Tory Lanez is on the mend and feeling much better after getting stabbed 14 times in a California state prison, TMZ has learned.

Sources with direct knowledge tell TMZ ... the rapper was transferred back to the prison hospital within the last few days after getting treatment at a medical facility in the Bakersfield, CA area.

We're told Tory's condition has "stabilized," and he's now breathing on his own and able to talk. Prison officials say Tory is currently in fair condition.

Legendary wrestling commentator Jim Ross just revealed he's dealing with yet another health battle -- alerting his fans of his recent colon cancer diagnosis.

The 73-year-old AEW announcer shared the news on X on Thursday ... stating surgery will be scheduled in the next few weeks as he fights the disease.

"I appreciate your concern and support," Ross said.

Hulk Hogan just underwent neck surgery ... but TMZ Sports has learned he's already up and runnin' wild!!!

A rep for the wrestling legend tells us ... Hulk required a "little fusion procedure" on Wednesday in an effort to make him "feel a little better."

The 71-year-old, though, required little recovery time, and was back to work on Thursday.

Jennifer Lopez is ready to get back on the floor following a facial injury ... which required stitches!

The "Dance Again" hitmaker revealed on her Instagram Story Tuesday she sustained a painful-looking injury to her nose while rehearsing for the upcoming 2025 American Music Awards, where she will host and perform on May 26.

Though she didn't reveal what exactly happened, her injury was serious enough to require stitches.

Jayson Tatum's playoff run is over -- the Celtics just announced he had surgery to repair a torn right Achilles.

The Boston forward sustained the injury late in Monday night's loss to the New York Knicks at Madison Square Garden -- when he went down while trying to leap for a loose ball.

Initially, all of Boston had hoped it wasn't too serious ... but the Cs said Tuesday that Tatum had "successful surgery" on his ruptured right Achilles and will have a lengthy rehab to get back to the floor.

11:45 AM PT -- The Yankees just placed Oswaldo Cabrera on the IL, listing his injury as "a left ankle fracture."

New York Yankees third baseman Oswaldo Cabrera was forced to leave the diamond Monday night inside an ambulance ... after he sustained a gruesome leg injury while sliding into home.

The tough-to-watch scene unfolded in the ninth inning of the Pinstripes' 11-5 victory over the Mariners in Seattle ... when Cabrera was racing to score on an Aaron Judge sacrifice fly.

In an effort to avoid the tag at home, Cabrera moved suddenly, but his left ankle didn't quite catch up with the rest of his body ... and it appeared to snap right on the field.

Jalen Brunson and Karl-Anthony Towns led the Knicks to their biggest playoff win in decades Monday night ... but celebration aside, the star hoopers expressed concern for Jayson Tatum, after suffering a devastating injury in the game's closing minutes.

The heartwrenching injury happened during the final minutes of the pivotal game at Madison Square Garden ... after 27-year-old Tatum appeared to suffer a non-contact injury to his lower right leg/foot area, with many fearing he tore his Achilles.

Tatum immediately fell to the floor, clutching the area, clearly in a great deal of pain.

A Fox News guest fainted live on-air ... and instead of immediately attending to her, host Jonathan Hunt awkwardly kept the segment rolling -- instead of, you know, checking to see if she was still breathing.

It all went down on "Fox News @ Night" Thursday when guest Camryn Kinsey was mid-rant about Trump vs. Biden and Harris -- she started stuttering, her eyes rolled back, and then she literally toppled off her chair sideways, with an audible slap as she hit the floor.

It all happened in a flash, and Hunt sat there stunned ... and then, outrageously, just tried to carry on like nothing happened.

A janitor in Russia was swept off his feet by a speeding car ... 'cause he got flipped while jaywalking across a wide avenue -- smashing in the windshield in a dramatic video.

The clip comes from Sayansk -- a small town in the Irkutsk Oblast region of Russia -- Tuesday, when a man briskly walked across the busy road, right in front of oncoming traffic.

Check out the clip ... the man is crossing the wide street on foot -- and, while the first car stops for him, the second driver doesn't appear to see him until it's too late.