Britney Checks Into Rehab - Out a Day Later

TMZ has learned that while Britney Spears checked-in to rehab, she refused to stay and checked out -- less than twenty-four hours later!

As "EXTRA" first reported, the pop star entered a rehab facility two days ago. Now TMZ has learned that the center was located outside of the country, and she refused to stay. PEOPLE confirms that Brit was at Eric Clapton's Crossroads rehab facility in Antigua.

TMZ is told that Britney checked in at the urging of riends and family, after being seen intoxicated in public places and was so "exhausted" on New Year's Eve she collapsed.

According to TMZ sources, Britney is on her way back to Los Angeles.

A rep for Britney could not immediately be reached for comment.