Nurse!

In a statement to TMZ, the 18-year-old singer's rep says, "Demi Lovato left her tour early this weekend in order to seek medical treatment for emotional and physical issues she has dealt with for some time."

We're told Demi is not seeking treatment for drug use.

The statement continues, "Demi has decided to take personal responsibility for her actions and seek help. She is doing just that."

The rep concludes, "[Demi] regrets not being able to finish her tour, but is looking forward to getting back to work in the near future."

Sources close to Lovato tell us the singer was in a physical altercation with a female member of her tour recently ... which was a "catalyst" in her decision to seek professional help.

Emergency vehicles responded to the blaze and evacuated 4 people from the home. Arnie was removed from the house in a stretcher and placed into a waiting ambulance.

We're told everyone is "OK."

Anhalt tells TMZ he was outside his Beverly Hills home on Tuesday "sunbathing and eating Kaiserschmarrn" -- which is totally normal -- when he somehow swallowed a bee ... that ended up stinging his throat on the way down.

Anhalt says he suddenly "could not breathe and turned blue" ... and had to be rushed to a local hospital.

Sources close to Angelina tell us the reality star was inside Hot Topic at the Staten Island Mall when she was approached by a "rowdy group" of young people.

Angelina claims somebody attacked her from behind -- striking her in the back of the head. According to police sources, a friend of Angelina's told police someone threw a bottle that skimmed her lip. We're told she immediately called police for help, but refused medical attention.

But mall security paints a slightly less dramatic tale -- they tell us a few people were filming Angelina and her friend when the crowd got chaotic and somebody accidentally smacked her in the face.

Security quickly arrived to the Hot Topic and ordered the kids to leave the store.

We do not know the nature of her condition.

TMZ broke the story ... Gunvalson filed for divorce last week.

UPDATE: Sources tell TMZ Gunvalson is suffering from internal bleeding. She's being kept overnight for observation for upper G.I. problems.

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We're told he was in New York City when there was some sort of medical emergency, and Charlie was taken to a local hospital.

We're now told at 2:07 AM, emergency dispatch received a 911 call for possible intoxication. Charlie was taken to New York Hospital at 2:30 AM. Police sources say Charlie went voluntarily and that Charlie was "intoxicated, irrational" and "emotionally disturbed."

Charlie is in New York to spend time with Denise and their two kids.

UPDATE: The New York Post is reporting Charlie was drunk and naked in his hotel room at 2 AM when security was called. The Post reports chairs had been thrown around the room and a chandelier was damaged. The report also mentions that Charlie headed back to his hotel room with an unidentified woman and that he flew into a rage after noticing his wallet had gone missing.

Story developing...

Sources close to Simmons tell TMZ he hit his head after fainting and was rushed to the hospital. He suffered a cut on his forehead and, after tests were run, sources tell us the doctors concluded it was just dehydration.

He was released today.

We're told the legendary Sci-Fi actor -- who had to miss an appearance at the Massachusetts Museum of Contemporary Art yesterday -- is currently "recovering beautifully."

Michael claims his attacker used a "sharp object" to slice through his flesh. Judging from the overlapping scratches on his neck -- the suspect either took two swipes at Mike's head ... or used two sharp objects.

As TMZ first reported, Michael claims he was attacked outside his home in Santa Monica, CA. Michael told police ... about an hour before the incident, he received a threatening phone call. We're told shortly after the call, Michael went out for cigarettes -- that's when he says the attack occurred.

Sources tell us ... Mike explained to police when he went to open his car door, he was jumped from behind. We're told the suspect, whom Michael says is in his 50s or 60s, began choking him and had some kind of sharp object which he used to slice Michael's neck. Michael says the knife penetrated his skin and caused substantial bleeding.

According to sources, Michael says the man cut him again as he fought the guy off. The suspect eventually fled on foot.

Sources tell TMZ Michael's story goes like this: He was getting into his car shortly before 10:00 PM when someone came up behind him and started to choke him. Michael is telling cops he fought with the suspect before the man took off running.

We're told Michael described the suspect as a white male in 50s or 60s -- yes, that old -- who is wearing a black running suit.

The Santa Monica Police Department got a 911 call at 9:56 PM and responded to the scene. Michael was shirtless when officers and paramedics arrived (seen above) and we're told he had scratches on his neck. Cops are still investigating on scene.

According to law enforcement sources, the "Desperate Housewives" hottie was driving on busy Hollywood Blvd when someone suddenly turned in front of her. Eva was unable to avoid the car and collided with it.

We're told both Eva and the other driver had very minor injuries -- no one went to the hospital -- and the accident is under investigation ... however the early indication is Eva won't be on the hook for the damage.

Eva's restaurant, Beso, isn't far from where the accident happened. Calls to her rep were not immediately returned.

It all went down this afternoon ... a TMZ photographer was shooting Hugh when a van and a Jetta collided across the street.

Our guy ended up interviewing one of the drivers involved in the accident -- who explained that he was looking for his next turn when, "I see all these cameras and Isee Hugh Jackman. Next thing I know, I went to take the turn ... BAM."

We're told the retired NFL superstar sustained injuries in the wreck -- cops are on scene. TMZ obtained these photos of Seau's Cadillac Escalade which landed at the bottom of a cliff several feet from the beach.

Seau has been transported to a local hospital. The accident happened just south of Oceanside, CA ... where the former San Diego Charger had just been released from jail hours earlier.

As TMZ first reported, Junior Seau was arrested early this morning for domestic violence.

A rep for the singer told the AP that Dion is at St. Mary's Medical Center in West Palm Beach, Fla ... and insisted Celine decided to admit herself to ensure that she's around her doctors until the delivery.

Dion and her husband Rene Angelil have one 9-year-old son.

Cookie, Jwoww's opponent, tells TMZ, “I really think that girl needs to look into some counseling. Her anger issues are obviously out of control."

She adds, "Then again if my face looked like that, I'd be pretty pissed at the world too.”