This new diet craze is sweeping the country.

The Flat Belly Diet, a weight-loss plan from Prevention that is tightening tummies all over the nation, says no crunches are required. The diet focuses on five "Flat Belly" foods: oils, nuts and seeds, avocado, olives, and chocolate. (Chocolate? Bring it on!)

Have you tried the Flat Belly Diet? Does it really work?