The singer spoke of how Michael and her other brothers called her names such as "horse", "pig", "cow" and "slaughter-hog", which she admits affected her deeply.
In an interview on the Today show, Janet admitted: "I would literally bang my head up against the wall because I didn't feel attractive. There was a lot of pain in my life. But I did. I felt very unattractive."
On her brothers' teasing, she said: "It makes you laugh, it really does. It makes you laugh. I guess some people could say, 'Oh that's, you know, brothers and sisters joking, it's all affection, it's all, you know, it's in a loving way,' but not everybody can brush it off, and I was one of those."
Janet went on to recall that her issues with her weight began when she was asked to shed pounds for a role on a TV show at the age of 10.
She explained: "I was asked to lose weight. I wasn't a heavy kid on the show but I was 10 years old and developing very quickly so they would put gauze around my chest to make me smaller, and I think that has an effect on you as a child as if who you are isn't good enough."
