Nurse!

Sources tell TMZ that Nicole Richie passed out at Hyde nightclub early Sunday morning in Hollywood.

We're told it occurred just before 2 a.m., when Richie passed out and fell to the floor. An employee approached Richie and her friends and said he was calling 911. Sources say they told the employee not to make the call and that they would take Richie to a hospital. The friends then carried Richie out of the club through the back door. TMZ does not know if Richie went to the hospital.

Before Richie collapsed, we're told she hung out for awhile with Lindsay Lohan inside the club. Lohan had her own bizarre tale early Sunday morning on a street in Hollywood.

Late last week, Richie's reps confirmed that the "Simple Life" star entered a treatment facility to determine why she hasn't gained weight. Richie has looked shockingly thin over the last few months.

Though Paris Hilton was swarmed by questioning photogs, the heiress kept quiet about Nicole Richie's checking into a treatment facility.

As she made her exit from Hollywood hotspot Area, a cameraman repeatedly asked Hilton, "is it true Nicole is in rehab?" Paris evaded the line of questioning the only way she knows how - by pretending to talk on her cell phone.

Nicole checked herself into a private facility for an undisclosed treatment yesterday where, according to her publicist, she is "working with a team of doctors and specialists whose focus is nutrition."

Nicole Richie has checked herself into a private facility for an undisclosed treatment. According to a statement from Richie's reps, published on E! News, "She is working with a team of doctors and specialists whose focus is nutrition..."

Nicole will undergo diagnostic treatments to determine why she can't gain weight. Recent photographs of Richie have created a buzz in Hollywood that she may have issues with food.

Nicole's reps say "this is not a treatment for an eating disorder." The reps add that Nicole wants to deal with her weight issues in the healthiest possible way.

A bloody and seemingly banged up Felicity Huffman was wheeled off the set of "Desperate Housewives" yesterday, as the cast and crew could only stare in amazement. But fear not D.H. fans, it's all part of the show.

TMZ just spoke with Mario Lopez, who confirmed his dancing partner injured herself today, just hours before "Dancing With the Stars" airs live on ABC.

Lopez says Karina Smirnoff "hurt her back and neck in rehearsal" and doctors were summoned to the set. Lopez says Smirnoff is in pain, adding, "I hope she pulls it together. I'm nervous."

Mario, who is a favorite to win the competition, is scheduled to dance the tango tonight. The dance, known for it's jerky movements, could be particularly difficult for Smirnoff.

Just hours before tonight's taping of "Dancing with the Stars," TMZ has learned that Mario Lopez's partner, Karina Smirnoff, has suffered an injury on the set of the hit ABC show.

While reps for the show are denying that any incident has occured, sources inside CBS Television Studios, where the show is taped, tell TMZ that medics were rushed to the scene to treat a muscle pull in Smirnoff's back. No word on who Lopez will dance with in the case that Smirnoff will not be able to participate in tonight's live broadcast.

The endless speculation over Nicole Richie's conspicuous lack of weight continues unabated. But if the photographic evidence is any indication, the "Simple Life"-er is, as she told the world last week, trying to do something about it, as she visited a clinic whose founding doctor specializes in dietary health.

Richie was spotted walking into the DeOrio Wellness Medical Center in Santa Monica on Friday, hoisting a massive white bag to her face to shield herself. The holistically-focused DeOrio clinic bills itself as a facility that helps patients "renew and unleash the inherent vitality found in each person and ... achieve the proper balance of mind, body, and spirit." Given this rather broad portfolio, Richie could've had an appointment for just about anything, and DeOrio staff were not available to confirm Richie's visit or the reason for it.

The mishap occurred while the "Ferris Bueller" star was horseback riding at his holiday home in Ireland. Broderick was treated at a local hospital and was accompanied by his wife, Sarah Jessica Parker.

The mishap occurred Sunday while the "Ferris Bueller" star was horseback riding at his holiday home in Ireland. Broderick was treated at Sligo General Hospital Monday, accompanied by his wife, Sarah Jessica Parker.

Broderick was treated and released. The actor's publicist told TMZ "Matthew is in a little pain but is fine."

With word that supermodel Christie Brinkley is separating from her fourth husband, we couldn't help but wonder: Who's had a harder life post divorce -- Christie or her second ex, Billy Joel?

Brinkley's rep confirmed on Tuesday the split from Peter Cooke, her husband of 10 years. She has a daughter with Cooke, a daughter with Joel, and a son with third husband Richard Taubman.

Actually, a tragedy brought Taubman and Brinkley together. They met when both were passengers in a helicopter that crashed in Colorado in 1994. Ironically, they married near the site of the chopper crash but the union lasted for less than a year. Brinkley reportedly had to pay Taubman $2 mil as a parting gift to end the marriage.

Paris Hilton hit a parked car causing damage, then left without leaving a note -- allegedly a violation of California law, and it's all on video.

It happened Thursday after a shopping spree in trendy Robertson Blvd in L.A. with her new BFF, Kim Kardashian . After loading her shopping bags into the trunk of her Range Rover, Hilton says good-bye to Kardashian and starts to back out of the parking spot without her seat belt on -- another violation of law.

Richie's man has been at the hospital for the past several days following up on gastric bypass surgery, a procedure he had in 2003. Richie has been at his side almost every day, spending hours a day at St. John's.