Demi Lovato: I Have Bipolar Disorder

Three months after leaving a residential treatment center, teen star Demi Lovato is bravely opening up about her private struggles - not only with anorexia and bulimia, but also with bipolar disorder. "I never found out until I went into treatment that I was bipolar," Lovato told People in a candid interview that took place last month in her L.A.-area home. But during her three-month stay at a treatment center where she underwent therapy for anorexia, bulimia and cutting, Lovato, 18, who said she's "battled depression from a very young age," discovered why she was having trouble controlling her emotions and actions.