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BRITNEY SPEARS is currently under evaluation at the UCLA Medical Center and placed on a 5150, which is a 72-hour hold. But there's been speculation the troubled pop star may even be in the hospital for a full two weeks. "The way it works is a law enforcement agency or mental health professional can conclude that someone is a danger to self or others, and undertake an involuntary commitment," ALLAN PARACHINI, L.A. Superior Court spokesperson told the Associated Press. "To extend that for another 14 days there has to be a court hearing. That's typically held in the hospital where the patient is."