Britney Spears Spotted Leaving Attorney's Office

Brtiney at Promises Rehab in Malibu

"Extra" has confirmed that pop princess Britney Spears checked into rehab late Tuesday morning at the urging of her concerned family and friends.

Britney is seeking help at Malibu’s exclusive treatment facility, Promises.

“Extra” recently got an exclusive tour of Promises, where patients share a room during their average 45-day stay.

Promises founder Richard Rogg told us that patients are at a very low point when they seek help.

“You have to hit a mental, spiritual, emotional kind of bottom,” Rogg said. “It’s that place where you are too afraid to go on living and too afraid to die.”

This breaking news comes just days after Britney shaved her head, and on Monday, “Extra” discovered new clues that may explain why Brit gave herself a buzz cut.

According to a stunning new report in OK magazine, Kevin Federline was at the pop star’s Malibu mansion on Friday when she arrived home from rehab, and a blowout between the exes broke out.

“They had a huge argument,” revealed OK’s Rob Shuter. “Kevin threatened Britney that he was going to have people test her hair to find out exactly what she’s been up to. She was so scared. That was what made her have her head shaved.”

We have also learned where Britney fled to Friday night after daring to go bald; she reportedly showed up at L.A.’s chic Mondrian Hotel in an electric blue wig.

Sources revealed that Brit was seen shaving her legs at the pool and crying after she was refused a room.

“She didn't have any credit cards, she didn't have any cash… I don’t even believe she had any I.D.,” dished US Weekly’s Katrina Szish.

Szish added that Brit’s bizarre behavior was noted by the staffers who dished, “she was depressed and confused.”

“The general consensus is we’re seeing Britney have a breakdown before our very eyes,” Szish told us.

After Britney’s sudden downward spiral, her friend JC Chasez expressed his concern from across the Atlantic.

“I feel bad for her,” JC said to MTV U.K. “I’ve known her since she was 12 years old; she’s one of the sweetest people you've ever met."

Chavez also pointed out, “A divorce at age 25 is never going to be easy; the one person she trusted more than anybody in the world is not with her anymore.”

Britney's Hair For Sale For One Million Dollars

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Former Assistant Urges Britney to "Get Help"

Felicia Culotta, the 41-year-old former assistant to Britney Spears is reportedly sending a heartfelt plea to her old boss to cut the crap and get back on track.

Below is an excerpt from a letter from Culotta:

I LOVED being with Britney for the past 9 1/2 years. I enjoyed being a part of HER dream, but now, am living my own dream. I cherish ALL the incredible opportunities that came my way thru my job with Britney and am crushed/saddened/heart sick by the way her life is unfolding…I want you to know that WE (as in her Family and nearest and dearest—ALL of whom are NOT on the payroll anymore!!) are doing EVERYTHING in our power to get help for Britney and all in our power to NOT pad the bottom or move the bottom, so when she does indeed hit rock bottom, she’ll stand up and walk away from this whole fiasco a new, confident, changed, career driven Britney like we all knew and loved.

To see what’s transpiring now, makes me feel a failure, defeated. I LOVED and BELIEVED in what I was a part of for the past 10 years and was so incredibly proud of Britney and all she’d become.

A rep for Spears could not be reached for comment.

Britney Spears: Being Single Is 'Awesome'

Britney Spears doesn't miss being married. When asked by PEOPLE in New York on Friday how she likes being single, the pop star, who filed for divorce from Kevin Federline on Nov. 7, said: "It's awesome."

Spears grabbed the spotlight Friday while at the fashion show for Baby Phat by Kimora Lee Simmons and KLS Collection Fall 2007, which was held at the Roseland Ballroom in conjunction with Mercedes-Benz Fashion Week. Wearing a slinky black spaghetti-strapped dress and black peek-a-boo pumps, Spears posed for photographers upon her arrival, and was escorted to her front-row seat just moments before the show started. As the models strutted on an elevated stage wearing sexy tweed outfits, double-breasted winter coats and big fur hats for the show entitled "From Russia with Love," Spears chatted at times with her assistant. She applauded with the rest of the crowd when model Alek Wek flaunted a colorful halter dress that dragged on the floor in the back but was a mini-dress in the front. "Oh my god," said Spears.

After the show, Spears told PEOPLE of the collection: "It was amazing." Kimora Lee Simmons, who was backstage after the show, said of Spears: "Sometimes she gets a hard rap...[But] she is a very talented girl."

Trashtastic Spears Goes to Target!

Britney Spears shows her down-to-earth side as she shops at retail giant Target. Spears, 25, picks up a play set/tree house for her sons Sean, 1, and Jayden, 4, months, and other bargains with her friend. January 29, 2007.