BRITNEY SPEARS AND JUSTIN CHAMBERS

Confined mental Britney Spears almost had another celebrity for company in the psychiatric ward at UCLA Medical Center. "Grey's Anatomy" star Justin Chambers was also a patient this week. The Hollywood actor, who plays Dr. Alex Karev in the medical drama, checked himself in early in the week. Chambers representative has confirmed the star checked in on Monday and checked out hours before Spears was brought in for a 72 hour psychiatric hold. The insider tells TMZ.com, father-of-five Chambers was "exhausted and suffers from a sleeping disorder and went in voluntarily to get some help." It is reported Chambers was on the same ward where Spears is currently being treated.