Britney Spears has bipolar disorder?

Britney Spears could be suffering bipolar disorder.

“Her erratic behavior has moved into bipolar disorder,� psychologist Dr. Robert Butterworth tells Us Magazine.

“Your energy level and emotions alternate between highs and lows, and that seems to have happened here.�

Psychologist Robi Ludwig, who hasn’t treated her, agrees – to a point.

“It seems that Britney has a mood disorder,� she says, acknowledging that the singer’s behavior is “self-destructive, erratic and dramatic,� which could also be symptomatic of drug and alcohol abuse.

She added: "She strikes me as someone going through a delayed adolescence."