Nurse!

A private jet carrying Chris Brown was forced to make an emergency landing in Burbank yesterday after the cockpit filled with smoke after takeoff ... TMZ has learned.

We've confirmed ... Brown boarded a Gulfstream 3 jet in Burbank and was headed for Teterboro, NJ ... so he could attend the Met Gala event.

But sources tell us ... roughly 7 to 8 minutes into the flight, everyone on board began to notice smoke filling the plane.

One source told us, "It was A LOT of smoke ... everywhere."

The pilot immediately turned the plane around and performed an emergency landing back at Burbank airport.

We're told the passengers were scared ... but the pilot was cool, calm and collected ... and couldn't have handled the situation better.

Here's the crazy part -- after the plane touched down, Brown decided he STILL wanted to get to the Met Gala event in NY ... and boarded ANOTHER private jet within an hour of touching down.

Brown eventually made it to Teterboro ... but he didn't make the Met Gala event. However, he DID make it to an after-party, where he arrived with a smile (see picture above).

Question is ... would YOU get back on a plane after an emergency landing?

P!nk has a message to all the haters who claim she faked sick to get out of a performance in England -- "KINDLY KISS MY ASS!!"

Ever since P!nk pulled out of her April 22nd show in Birmingham, certain "fans" called BS on the singer's sick excuse ... and insinuated she doesn't really care about her U.K. fans.

But today, P!nk fired back via an open letter on her website ... saying, "I am a human being, therefore I am able to catch illness. It is beyond my control -- and I can't apologize for that."

"And you know what I've been performing through the last week? ROTA virus. Look it up. I challenge any one of you to do what I do while sick with that. You couldn't do it."

FYI -- Rotavirus is no joke. According to the Center for Disease Control, rotavirus causes "severe watery diarrhea, often with vomiting, fever, and abdominal pain."

P!nk actually concludes her letter by apologizing to her "loyal and understanding fans" ... saying, "I am so so sorry if I've hurt you in any way."

Motley Crue guitarist Mick Mars was knocked to ground by an overzealous fan last night after the guy bum-rushed the stage in the middle of a concert ... and sent the 62-year-old birthday boy flying.

The show took place at Spectra Place in Estevan, Saskatchewan, Canada on Saturday ... which just so happened to be Mars' bday.

The band was just finishing the song "Primal Scream" when the guy bolted across the stage, knocking over Mars and then making a run at lead singer Vince Neil ... before security stepped in and hauled the guy away.

The group left the stage briefly to make sure Mars was okay to continue, which he was.

Before Brittney Griner signed her fat new contract as the #1 overall pick in the 2013 WNBA draft ... she had to make a promise to her team -- I'LL TONE DOWN MY SKATEBOARDING HABIT.

"I agreed with the Mercury that I would only ride in a controlled environment," Griner tells TMZ ... "No tricks or hill bombing."

Besides being the most dominant female basketball player to come out of college in years, Griner is an avid skater ... who's been riding since she was a little kid.

"I know what is at stake, so I'll just be cruising. I'll get my adrenaline rush on the court."

Griner -- who's 6'8" and DUNKS -- caused a major uproar during her college career at Baylor when she broke her wrist while riding in a parking structure.

"Before that, I had never been injured," Griner said ... explaining, "[I was] going too fast."

"Once my basketball career is over though, I will be building a skate ramp in my yard, that's for sure."

"Naked and Afraid" producer Steve Rankin's rotten, snakebit, bone-exposed foot is in the running for the grossest photo ever taken -- just ask Kermit the Frog!

Here's retired actress turned Twitter sensation Amanda Bynes showing off her God-given talents in one of her latest pics (left) -- and reassembled pop princess Britney Spears back during her unbeweavable 2007 MTV VMA "performance" (right).

Only one is currently under a conservatorship.

This may be the most disturbing thing you see in the month of May ... a deadly snake bit a TV producer in the foot ... and the damage is bone-chilling -- literally and figuratively.

WARNING: If you have a weak stomach ... DO NOT CLICK HERE.

The zombie foot belongs to Steve Rankin ... a producer on the upcoming Discovery show "Naked and Afraid," which drops 2 nude survivalists in remote locations and films their struggle to stay alive.

Rankin tells TMZ ... "I was scouting locations in Costa Rica ... As I was traversing through some deep jungle I was bitten on the foot by a Fer-de-Lance. It's one of the deadliest snakes in the world and the fangs went right through my boot."

Rankin says his team hustled him for 2 miles on a makeshift stretcher, drove to a helipad and had him airlifted to a San Jose hospital ... where he got antivenom and antibiotics. But things went horribly wrong ...

Waiter! There's a chunk of glass skylight panel in my soup!

We joke because no one got hurt ... but this is SCARY ... a glass skylight panel at Spago just crumbled and dropped glass in the main dining room during lunch service.

The room was cleared -- customers were moved out to the patio -- and repairs are already under way.

A restaurant spy tells TMZ ... the panel merely cracked and crumbled ... but the safety netting inside held most of it together ... only small bits of glass rained down. Again -- so far NO reports of anyone getting hit.

The panels (stock image from Spago's website above) are about the size of your average small apartment window ... and are fairly new ... they were part of the renovations before the hotspot's reopening last September.

11:40 AM PT -- Weezy just tweeted that he's fine.

Lil Wayne was hospitalized again for a seizure ... TMZ has learned.

Sources close to Wayne tell us ... the rapper was taken to Cedars-Sinai in L.A. late Tuesday night by his bodyguards. We're told he suffered a single seizure and was treated and released early this morning.

As we first reported, 30-year-old Lil Wayne spent a week at Cedars back in March after suffering multiple severe seizures that nearly killed him. He spent 6 days in ICU.

Wayne subsequently went on the radio and explained he's an epileptic, and has been suffering from seizures since he was a kid.

He may have a cracked toe ... a disgusting, bloody, broken toe ... but Jon "Bones" Jones stomached the pain last night and crutched out for some delicious BBQ in NYC.

In case you haven't seen the injury -- don't, it's gross -- but Jones exploded his little piggy during his UFC 159 beatdown of Chael Sonnen this weekend ... and now, he's gotta use crutches to get around.

In fact, Jones felt healthy enough to venture out to Dallas BBQ in Times Square ... and told TMZ he's doing well and feels good.

It's a miracle Harry Styles is alive ... because the One Direction singer was nearly crushed to death by a mob of screaming chicks in Paris yesterday.

We've said it before ... but seriously, these fan girls are insane -- Harry was leaving Hotel Amour without any decent security, and the screaming female crowd went ABSOLUTELY BANANAS.

The horde nearly swallowed him whole before he got to his car ... no kidding ... he even lost his beanie in the process. It's unbelievable.

Catherine Zeta-Jones has checked in to a treatment center to get more help for her Bipolar disorder ... TMZ has learned.

We've learned ... the 43-year-old Academy Award winner checked in to the treatment center Monday ... and is expected to complete a 30-day program.

Sources connected to the actress tell us ... Jones' stint in the treatment center is a proactive measure. As one source puts it, "It's maintenance."

FYI -- Jones completed a stint at a treatment center in 2011 -- at the time, her rep said Catherine had "made the decision to check in to a mental health facility for a brief stay to treat her Bipolar II disorder."

Zeta-Jones was last seen in public on April 22 -- when she hit the red carpet at the 40th Anniversary Chaplin Award Gala at Lincoln Center looking healthy ... with her husband Michael Douglas by her side.

There are a lot of things Louisville Cardinals guard Kevin Ware can't do since suffering one of the more gruesome injuries in sports history ... but he told our photog yesterday in DC ... he can still get down with the ladies.

And really ... that's all that matters, right?

Jennifer Arnold and Bill Klein -- stars of TLC's hit "The Little Couple" -- just adopted the cutest little boy from China ... and like any sized parents, they have quickly learned ... TODDLERS POOP A LOT.

Our photog spoke to Jen and Bill on the streets of NYC as they walked hand in hand with the newest addition to their family, 3-year-old William, who was also born with a form of dwarfism.

It's clear from the video the new parents -- who struggled for years to have a kid -- are excited to learn the tricks of the trade.

Turns out '90s star "Parker Lewis" can lose ... at surgery ... the actor tells TMZ he had to go under the knife a SECOND time following his near-death boating accident, because the first surgery didn't cut it.

Corin Nemec -- star of "Parker Lewis Can't Lose" -- was in a horrific accident back in January, which left him with a shattered leg. Nemec had one surgery (below) earlier this year and was on the road to recovery ... but the break was so extreme, it didn't heal properly.

Nemec tells TMZ ... to fix the problem, doctors had to open his leg up again in order to have his femur reamed -- an intense process which involved inserting a titanium rod into his leg, followed by major grafting work. Pretty painful stuff.

Nemec says he's trying to stay positive despite the setback -- and hopes this surgery will finally fix the problem so he can move on with his life.

Bob Weir -- founding member of the Grateful Dead who now plays guitar for spinoff band Furthur -- had to be helped offstage last night in Port Chester, NY, after collapsing during a song after suffering some serious pain in his shoulder.

The band, which also features former Dead bassist Phil Lesh, was playing the Dead song "Unbroken Chain" when Weir wobbled for a few moments before going down (00:45 mark in the video).

Weir was immediately helped up by crew members and given a chair to sit in on stage. The band finished the song with Weir ... but helped him off the stage as soon as the jam ended.

Lesh returned to the stage moments later and said Weir had been bothered by a strained shoulder. They finished the set without him.