Jennifer Aniston

Once told by the entertainment industry that she needed to lose 30 pounds, Jen was introducted to the Zone diet during her Friends years. She credits the diet for working for her lifetstyle as she shuns bad carbs.

"I still live somewhat by the Zone, it's the only thing that works for me. Before, I had been starving myself and in a dieting vortex I couldn't get out of."

Brittany Snow

"I always had in my mind that being skinny was better, even as a little girl."

"In the lunchroom at school, everyone would be like, 'I'm not eating fries today.' I thought, I don't eat fries at all. My fear of fries made me realize I was different from my peers."