Katie A. lost 52 pounds and gained a six pack with fitness videos and lots of motivation.

Contrary to popular belief, the key to a great six pack is NOT crunches! You can do crunches day and night and never attain a trim waist line because you cannot spot reduce fat no matter how hard you try. The perfect "real world" example is Stuart MacDonald and the body transformation that he achieved in "I Want to Look Like That Guy." Stuart went from a pudgy 44 inch waist to a shredded 27 inches in 6 months time. Stuart only trained abs directly 1 time a week. His strict attention to diet and consistent cardio is what made the magic happen.

Hope Carter from the documentary "I Want to Look Like That Girl."

Meet Craig Pepi-Donat. He managed to lose 22 pounds and achieved 7 percent body fat.