Here is the documented video evidence of Britney's short stint in rehab at the Promises Treatment Center. Britney reportedly checked out this morning after spending less then 24 hours at the facility and into the Chateau Marmont. I bet her family and friends are freaking out right now. Those of you not familiar with the Chateau Marmont, it has long been a Hollywood hideaway and most notably is where John Belushi overdosed and died in 1982.