For Britney Spears's failed Allure cover story, the magazine takes to dissecting the crazy we all love.

Another expert says Britney Spears suffers from bipolar disorder

In the article titled “Britney on Hold,� Allure quotes NYC psychotherapist Jane Greer, who believes that Britney Spears suffers from bipolar disorder.

“Her behavior suggests bipolar disorder,� says Greer. “The manic episodes with impulsivity and loss of control – the flashing, the head shaving, the hitting the photographer’s car with the umbrella – are what we see.�

The therapist pointed to an incident in June when Spears publicly delivered a letter to her mother telling her to stay away from her children.

“Part of manic behavior is a flight from reality and the anger,� says Greer. “People who are manic get angry at people who try to take away their high – like her mother, for example – by introducing any element of reality.�