Nurse!

4:50 PM PDT -- Sources tell TMZ ... Ryan is going to go for it ... although they will have puke buckets on the stage ... just in case he loses it.

Ryan Seacrest feels like crap ... so much so he missed the rehearsal for "American Idol" tonight, and sources connected with the production of the show tell TMZ ... Ryan may be MIA for the first time in the 11-season run of the show.

We're told Executive Producer Nigel Lythgoe stepped in for Ryan during the dress rehearsal this afternoon.

Sources say Ryan had an IV in his arm, and is fighting "a bad stomach bug." We're told he was throwing up all last night and today.

Ryan was not at the rehearsal and it's unclear if he'll do the show. If he doesn't, Nigel is ready to step in.

Former WCW wrestling star Buff Bagwell is in intensive care at an Atlanta-area hospital after flipping his Jeep ... reportedly breaking several bones in his neck.

According to the Atlanta Journal Constitution, the accident occurred "late Monday" ... leaving the 42-year-old with broken bones in his neck and face ... and a broken jaw.

Bagwell was transported to a nearby hospital, where was admitted to the intensive care unit in serious condition ... and sedated due to the extent of his injuries.

7:31 AM PDT -- According to the police report, obtained by TMZ, Bagwell called his wife from his Jeep around 1:30 PM ... and "advised her he was getting ready to have a seizure."

Bagwell lost control of his vehicle a short time later ... spinning across the raised median, which caused the Jeep to flip over.

Rehabbed Disney queen Demi Lovato says ... she was often seduced into going into fancy nightclubs and high profile restaurants because promoters gave her free drugs and booze.

Lovato finally opened up about her dangerous partying habits to U.K.'s "Fabulous" magazine ... strongly suggesting she was using drugs before entering rehab in 2010.

Lovato never admits to using a specific drug ... but when asked about the rumors of her cocaine use she replied, "I would come off stage in front of 18,000 people and suddenly be alone in a hotel room. I'd come crashing down and would try to find a way to recreate that feeling, to stay 'up'."

The 19-year-old also says it was easy to get her hands on illegal substances ... saying, "Promoters gave me drugs and alcohol in restaurants or clubs. They wanted me to come back so I would be seen there. They were basically kissing my ass."

"I thought they were my friends. I thought I was having fun."

Lovato completed treatment for bulimia, depression and self-mutilation in 2011 ... and says she now understands how lucky she is to have survived her darkest period.

She braved the wilderness ... but former "Survivor" contestant Semhar Tadesse was no match for the tacky carpet in her L.A. apartment ... snagging her heel and breaking her foot ... and now she's suing her landlord.

Making matters worse, sources tell TMZ the fall took place on the staircase back in August ... and we're told Semhar broke two bones in her foot.

Semhar filed a lawsuit in L.A. County Superior Court, claiming the injuries were so serious .... she couldn't work. Sources say her medical bills are already north of $20k.

Two months after the fall, Semhar was arrested for DUI -- she previously told TMZ, the only reason she bombed her field sobriety test was because of her injured foot, which prevented her from walking a straight line.

Rap star Lil' Scrappy -- who's worked with Lil Jon, 50 Cent, Three 6 Mafia and more -- was hospitalized in Atlanta yesterday after suffering a nasty asthma attack ... TMZ has learned.

Scrappy tells us ... "I damn near died ... if it weren’t for my driver, mom, and rap artist I would have been dead."

The 28-year-old says he had been drinking pretty hard Monday night ... and when he woke up Tuesday morning, he could barely breath and couldn't talk -- "I felt like I was dying."

Miley Cyrus was rushed to an emergency room Monday night, after she cut herself with a kitchen knife.

We're told Miley was cooking in her kitchen in Toluca Lake -- in the San Fernando Valley -- when she was preparing dinner and made a bloody slip.

Miley's mom, grandmother and boyfriend Liam Hemsworth took her to the E.R., where doctors stitched her finger up.

In the photo, shot by Star Feine, showing Miley leaving the emergency room, you can see blood seeping through the bandage.

It's not easy to fall on your ass on stage and make it look kinda cool ... but Vince Neil might have pulled it off last night in Las Vegas.

Neil was performing "Girls Girls Girls" in his strip club when he bit it big time trying to jump on the stage. But ever the pro, Neil figured since he was down on the ground, he'd just crawl to the front of the stage ... where a bevy of hot chicks were waiting to dance in his lap.

Bee Gees legend Robin Gibb is in a coma and his family has gathered by his bedside amid fears he only has days to live ... this according to a new report.

Gibb has been battling colon and liver cancer and is now suffering from pneumonia, says The Sun.

The paper says the 62-year-old's family has gathered for a bedside vigil.

A family friend told the paper, "If there is anyone you would put money on pulling through such a dire situation, it would be Robin because he is a fighter. But this is a battle he will struggle to win."

Josh Hartnett hit up the Chateau Marmont -- and immediately reminded us of his most memorable night at the Hollywood landmark ... 3 years ago. Happy anniversary? Not exactly.

Former WWE superstar Maven Huffman has agreed to seek professional help in the hopes of kicking his prescription drug addiction ... and he's getting some help from his old pals at the WWE.

Maven's attorney, James Flynn, tells TMZ ... the 35-year-old has agreed to participate in the WWE's "Former Talent Rehab Program" ... after he was arrested last month for wrongfully obtaining more than 1000 pills of prescription painkillers.

"Yes, Maven is planning on working with the WWE and he was really impressed by their gesture to assist him" ... the lawyer tells us.

As we previously reported, the WWE says it will pay for 100% of any rehab or treatment program for former WWE wrestlers ... as long as the wrestler wants the help.

Maven's attorney adds, "It is Maven's sincere hope to use his experience to aid in the prevention of substance abuse and serve as an example to his fellow wrestlers and community at large."

"Maven would also like his supporters to know that he is humbled by the outpouring of support he has received over the past week and he sincerely apologizes to any of his family members, friends, and fans who have had to read the press surrounding recent events.'

Maven's lawyer says the wrestler is NOT admitting any criminal wrongdoing ... but says he "intends to cooperate with local law enforcement agencies to reach a timely resolution to the matter."

A rep for the WWE tells us, "We wish Maven nothing but the best."

The dude who passed out twice in a row at a recent Game concert insists ... he was NOT under the influence when he lost consciousness -- he was just hungry, exhausted, dehydrated ... and extremely hot inside his hoodie.

TMZ posted the video on Sunday -- showing Paul Gaza losing consciousness in the front row at Game's recent show in Santa Ana, CA. Game stopped the concert to make sure Paul got help (below).

During the show, Game had recommended Paul receive a steady dose of "p**sy" ... claiming his low levels of tang made often caused a similar reaction ... in his younger days.

But Paul says the P-word had nothing to do with his condition ... telling us he hadn't eaten (food) all day, was exhausted from standing in line for 6 hours to get inside the venue, hadn't had a drop of water to drink, and was burning up with his hoodie on.

All in all, the conditions created a perfect storm ... and Paul couldn't keep his head straight.

Shifty Shellshock is expected to be released from the hospital sometime this month and his family wants him to go straight from there to rehab, TMZ has learned.

As TMZ first reported, Shifty has been hospitalized since March 29 and was in a coma up until April 3.

According to our sources, doctors expect the Crazy Town singer to make a full recovery and be discharged from the hospital in the next few weeks. Our sources say there is no permanent damage and that physically he is fine ... but that Shifty is unable to still fully comprehend what is going on, have coherent conversations or really communicate.

"If you think you're having problems in life, imagine you're in the dentist's chair getting a root canal ... and the power goes out"
-- Mark Curry ... minutes after it actually HAPPENED to him yesterday.

With a half-numbed face and a mouth full of cotton balls ... the former "Hangin' with Mr. Cooper" star was standing outside of his dentist's office in Beverly Hills moments after the building lost power.

Despite the circumstances, Curry was crackin' jokes about the situation ... telling us, "My dentist had a flashlight on the top of his head and a drill he brought from home."

Larry Miller -- who's starred in a TON of hit movies including "Nutty Professor" and "10 Things I Hate About You" -- is currently in the ICU at an L.A. hospital after suffering a freak injury to his head.

Miller's rep tells TMZ ... the 58-year-old actor was having a beer at an L.A. bar Tuesday after taping Adam Carolla's daily podcast show ... when he went outside to take a phone call.

On his way back into the bar, Miller lost his footing and fell backwards ... smacking the back of his head on the hard floor.

People at the scene rushed to his aid and called 911. Miller was transported to a nearby hospital ... where he was treated in the E.R. before being transferred to the intensive care unit.

We're told ... doctors have told Miller's family the actor is expected to make a full recovery, but they want to keep him in the ICU for a couple of days for observation.

Dr. Bill Dorfman -- a world famous dentist who treats some of the biggest stars on Earth -- tells TMZ he keeps a "secret stash" of the teeth he's plucked from the mouths of his famous patients ... in the hopes of eventually selling them on eBay.

Dorfman -- who recently treated Lindsay Lohan and whose website features Jessica Simpson, Usher, Ozzy Osbourne, Anne Hathaway and Eva Longoria -- was outside Rock & Brews in El Segundo yesterday when he revealed his secret.

"I actually save famous people's teeth when I pull them ... but I can't tell you [their identities] 'cause it's like patient confidentiality."

He continues, "There have been a few really famous people and I thought one day maybe I could sell this on eBay."

Dorfman insists he always offers the teeth to his patients first ... but they often decline, "So I put it in the back and i just hold on to it."

One dentist told us, "What Dorfman is doing is just sick."

Former Crazy Town singer and "Celebrity Rehab" star Shifty Shellshock is now conscious again -- after falling into a coma last week, TMZ has learned.

Sources tell TMZ, Shifty had been on breathing tubes since Thursday -- when he originally fell into a coma -- but was successfully taken off them last night.

We're told Shifty is now responsive -- even speaking sporadically -- but he's still not fully aware of his surroundings. He is still in the ICU.

As we previously reported, it's unclear what put the singer into a coma -- but several people close to him are convinced drugs were to blame.