Britney Spears' former bodyguard TONY BARETTO has blamed the singer's alleged use of narcotics for her recent breakdown. The Toxic hitmaker hit the headlines last week (ends4Jan08) after a three-hour stand off at her Beverly Hills home when she refused to give her two sons, Sean Preston and Jayden James, back to ex husband Kevin Federline. Spears was later admitted to Los Angeles' Cedars-Sinai Medical Center on Thursday (03Jan08) to undergo a mental evaluation. And Baretto tells U.S. news show Extra he believes Spears' alleged drug use is to blame for her current state of mind. He says, "There's something that needs to be fixed with Britney. No bodyguard can't do it. An assistant can't do it. And Britney, obviously, can't do it alone. "The times that I've seen her use narcotics, maybe made her (mental) condition worsen. I think definitely she's got some kind of mental problem." He adds, "Her parents can't control her. The judge can't control her. Nobody can control her. She does what she wants. There's nobody that can tell her what to do."