Nurse!

Regarding the hospitalization, we're told O was admitted to the Thalians Mental Health Center last Sunday -- the same place Owen Wilson was at.

TMZ spoke exclusively to Beyonce's father, Matthew Knowles, who said medics were called because Tina has the flu and began to experience shortness of breath. Paging Janet Jackson!

Matthew tells us Tina's blood pressure was a little high and she was checked out by medics -- but she was not transported.

Pat O'Brien is out of rehab, but execs at "The Insider" are mum about his future.

Our spies spotted POB at Gelson's market in Pacific Palisades last Saturday. He looked painfully, painfully thin with sunburned skin -- "bordering on scorched" we're told. He loaded up on at least ten cans of Pringles and a bunch of bags of M&M's. At one point he was at the deli waiting for his number to be called, when a woman recognized him and started the whole "Oh my God," thing. Pat wanted no part of it and just bailed. Guess he didn't find it "so f***in' hot."

We called "The Insider" to find out if POB is coming back. A spokesperson told TMZ, "At this time Pat O'Brien is focused on his recovery and it's inappropriate to comment on rumors about the show."

Sources tell TMZ that Ms. Jackson has dropped out of performing on "Saturday Night Live" this week. No word who her replacement will be.

Us first reported Janet checked into Cedars-Sinai Medical Center in L.A. last night for shortness of breath and the flu.

Law enforcement sources tell TMZ Heather Locklear's psychiatrist is the one who called 911, after speaking with her on the phone.

We're told the shrink spoke with Heather on Saturday night and was alarmed because she was "upset" and he believed she might OD on medication prescribed for depression. The call was listed with dispatch as a "suicide attempt."

We're told when paramedics arrived, Heather was OK and it was a false alarm.

"Idol's" trainwreck du jour Jessica Sierra was in a Florida courtroom this morning trying to stay in rehab in Cali.

Sierra has been in a Golden State rehab since January, but as we previously reported the state sent her back to Florida because proper probation procedure was not followed.

The judge gave Sierra and her attorney until Friday to figure it all out, or else she'll have to find another place to continue her treatment.

TMZ has confirmed reports that actor Patrick Swayze is suffering from cancer.

Swayze's publicist issued the following statement to TMZ: "Actor Patrick Swayze has been diagnosed with Pancreatic Cancer and is currently undergoing treatment."

You can't do that on television!

TMZ caught the good doctor outside Mr. Chow last night where he dropped hints about the would-be-stripper ex-wife of Lorenzo Lamas making a visit -- but, sadly for us, did the right thing and protected that pesky patient/doctor privilege.

According to People, the wrecktastic weaved wonder has been prescribed antibiotics after being diagnosed with impetigo, a contagious skin infection which usually appears as small blisters or scabs.

That partly explains why she looked so bad over the weekend.

Supermodel Naomi Campbell has just been released from the hospital in Sao Paulo, Brazil, where she underwent surgery early this week to remove a small cyst. Local media is reporting she left by helicopter to an undisclosed location to avoid the paparazzi.

TMZ has confirmed that federal drug enforcement agents are investigating at least two MDs who prescribed drugs to Heath Ledger.

Immediately following the actor's death, DEA reportedly subpoenaed several documents from the NYPD and the Medical Examiner to try to determine exactly where Ledger got his cocktail of prescriptions that eventually caused his death. The agents are looking into whether these drugs were properly prescribed by physicians.

Supermodel Naomi Campbell underwent a minor medical procedure in Sao Paulo, Brazil yesterday. Are attitude adjustments operable?!

She was admitted to Sirio Libanes Hospital and reportedly flew all the way from London to Sao Paulo to have the surgery.