The singer claims her world famous sibling constantly teased her about her figure when they were teenagers, leading to her developing a complex about her size.

She confessed to Britain's Q magazine: "I was always made to feel like a fat kid by Michael. He'd say, 'This is what your butt should look like' and show me a picture from a magazine.

"He was such a happy kid, but then when he became a teenager he got issues. That's when he became an introvert and projected all that onto me. He called me brutal names, like fat butt, and say it was meant affectionately. It really affected me."

Janet recently lost over 50 pounds after bulking up for a role in new movie 'Tennessee'.

The pop star eventually had to pull out of the project after filming clashed with the recording schedule for her new album. Mariah Carey will now play the role originally offered to Janet.