As it turns out, the 72-Hour Strapped To A Gurney While Being Monitored By Five Burly Orderlies Super Mental Breakdown Watch under which Britney Spears was being detained at Cedars Sinai's vaunted Celebrity Meltdown Ward is not quite as restrictive in its patient-retention policies as we'd assumed, as Spears has already left the hospital following just a little over a day of crazy-containment.