Pop star Ashlee Simpson has been keeping a secret from her fans - she once suffered an eating disorder while she was training to become a ballerina.

The BOYFRIEND singer admits the pressures were so great on her when she became the youngest student ever accepted at the School Of American Ballet she started binge eating in a bid to compete with her peers.

Simpson tells Cosmopolitan magazine, "I was around a lot of girls with eating disorders, and I actually had a minor one myself.

"It was about six months of not eating too much at all. I was 11 and five feet two and about 70 pounds... My parents stepped in and made me eat. That really helped a lot."

Now, the 21-year-old is an advocate for natural looking girls with curves and hates to hear about teenagers starving themselves to fit in.

She adds, "I hate it when girls lose their curves. My sister (JESSICA) has curves and my mom has curves. I think it's sexy not to be a bone, and it's sad when people get too weight-conscious and don't look in the mirror and see themselves as being as beautiful."