Who says you have to be a size zero to be beautiful? Not singer Natasha Bedingfield.

The British Bedingfield, age 26 and size six, says she'll never be stick thin. Still, she's committed to staying fit and like many celebs, credits her small waist and flat stomach to good genes. To keep it all is shape, though, she follows the Zone Diet and a strenuous exercise schedule.

Bedingfield reports that she exercises every day, using a Swiss Ball and pumping out lots of lunges and sit-ups. She has a trainer too. And she plans to begin working out with singer Pink one of these days.

"Pink is going to teach me acrobatics, says the singer. "She opened the Justin Timberlake tour a few months before I did and performed these amazing moves with silk scarves. She promised she'd show me how to do it."

What are other stars doing to stay in shape? Find out here, at this AOL Body site.