Lady Gaga has joined the crowded week of celebs being open with their eating disorders. Monday it was Demi Lovato and Katie Couric. Now it's Gaga. launch a Body Revolution section to "inspire bravery." The pop star posted a somber photo of herself, eyes closed, wearing a bra and panties, with the caption: "Bulimia and anorexia since I was 15."

She encouraged fans to do the same: "Hey Guys its Gaga," she wrote. "Now that the body revolution has begun, be brave and post a photo of you that celebrates your triumph over insecurities." In just a few hours time, hundreds of people had responded.