Demi Lovato has always had body issues

Demi Lovato says her body issues began when she was just three as her tummy was too fat.

The 'X Factor' judge, who has spent time in rehab getting treatment for her eating disorder and self harming, admits she felt she was overweight from a very young age, and the insecurities have stayed with her.

She told talk show 'Katie': 'I remember being three years old in a diaper and rubbing my hand over my stomach ... and I remember thinking in my head, 'I wonder if one day this will ever be flat?' '

The 20-year-old beauty, who has recently been named as the new ambassador of a bullying campaign, was targeted at school as the girls used to tease her for her appearance.

Demi added: 'It played more of a toll on me than if I was physically abused in school. I've always said I wished that they had just hit me in the face and gotten it over with because what they said to me sticks to me to this day and it affected me, (turned) me into the person I am today. I was bullied and they called me fat and they called me horrible things.'