Britney Back To Rehab "In & Out" "Out & In"

Britney Spears walked out of a rehabilitation clinic just 24 hours after she checked in.

Fast forward Britney entering Promises for the second time, on Thursday, Spears joined a long list of other celebrities who have trekked to the lush Malibu facility to overcome addictions.

Famed for treating stars such as Mel Gibson, Robert Downey Jr. and Charlie Sheen.

The retreat boasts "uncommon luxury" and "the finest rehab programme in the world".

Treatment doesn't come cheap. A 30-day stay is $48,000.

If the perks alone aren't enough to keep her at Promises, Spears need only reflect on the possibility she could lose custody of her two young children to estranged husband Kevin Federline if she doesn't complete the program.

Federline showed up to Promises treatment centre in Malibu on Friday, according to reports. He stayed for about half an hour on what was Britney's second day in the rehab facility.

Last week Spears attempted to attend rehabilitation at Eric Clapton Crossroads clinic in Antigua, but again only stayed for a day.

Third times always a charm.

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Britney Enters Malibu Rehab Center