Sources at UCLA Medical Center tell TMZ Britney Spears has been classified as "G.D." - Greatly Disabled. That is a huge and dangerous deal. That means the patient is unable to take care of basic needs, such as the acquisition of food, clothing or shelter. Being G.D. is one of the criteria for involuntary commitment.

Several health care professionals tell us Britney has fallen into a "manic state" due to her bipolar disorder. We're also told, she arrived at the hospital this morning at around 2:15 AM but wasn't admitted until 4:15 AM, because she was causing such a scene in the hospital. - Read TMZ's blow by blow report of what went down Thurs morning.

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