Britney Spears (File Photo)

Photo Gallery>>>BEIJING, March 22 (Xinhuanet) -- Nearly a month after checking into Promises Malibu Alcohol and Drug Rehab Treatment Facility, Britney Spears checked out -- but to paraphraseThe Eaglesin "Hotel California," can she ever leave?

Spears' manager, Larry Rudolph, said in a statement she checked out "after successfully completing their program." He then asked that Spears' privacy be respected.

Spears, 25, entered the facility Feb. 22 after a bout of bizarre behavior that included shaving her head, getting tiny lips tattooed on her wrist, beating a car with an umbrella and foregoing the wearing of underwear. Photos of the incidents were beamed worldwide.

Spears has yet tosay why she sought treatment at Promises, which offers detox, counseling and 12-step programs, although it's common knowledge she and alcohol do not go well together.

Speaking of together, the 48,000 U.S. dollar "cure" at Promises seems to have brought Spears and soon-to-be-divorced hubby Kevin Federline closer together. She filed for divorce citing irreconcilable differences and was granted full custody of their two sons, Jayden James, 6 months and Sean Preston, 18 months.

But under a temporary agreement, the couple have agreed to joint custody. Federline spent much of his time taking care of the two boys while Spears was in rehab.Federline and the children reportedly visited Spears during her treatment.

Federline, who released his debut album in November, was celebrating his 29th birthday with his family Wednesday and then traveling to Las Vegas for a party Saturday at Pure Nightclub, said Federline’s publicist, Marilyn Lopez. He originally had made plans for another bash Wednesday night in West Hollywood, but canceled that event.

"He just wanted to have one party instead of two and wanted to spend his actual birthday ... with his family," Lopez said.

She declined to say if Federline was planning to see Spears on Wednesday.

(Agencies)