Britney Spears' family and close friends are urging the troubled star to check into a mental hospital in a bid to save her custody battle with her ex-husband Kevin Federline. Spears checked out of Los Angeles' Cedars-Sinai Medical Center on Saturday (05Jan08), where she was undergoing a mental evaluation following a dramatic stand-off with emergency services outside her Beverly Hills home on Thursday night (03Jan08), when she refused to return her two kids to Federline. Reports suggest Spears could be suffering from bipolar disorder, and her close confidantes fear she will not have a chance of regaining custody of two-year-old Sean Preston and one-year-old Jayden James unless she seeks professional help. But TMZ.com claims Spears is refusing to listen to their advice, and sources say she has since "pulled it together, at least on the surface". Spears' visitation rights to see her sons were temporarily suspended and Federline was awarded "sole legal custody and sole physical custody" of the kids at an emergency hearing on Friday (04Jan08). The custody order lasts until 14 January (08).