How Kimberley Locke and more celebs shed pounds!

"American Idol" alum KIMBERLEY LOCKE was one of the star weight loss success stories of 2007, losing 40 pounds on the Jenny Craig Weight Loss system and going from a size 14 to a size 6! Now, Us Weekly magazine is counting down the top five most do-able star diets -- including Kimberley's and four other familiar faces -- in its issue on stands Friday.

Kimberley got off to a good start on VH1's "Celebrity Fit Club," dropping 27 pounds on the rigorous reality show. But when she joined Jenny Craig she was able to lose 13 more on their portion-control program. 

"Dancing with the Stars" host SAMANTHA HARRIS had her baby girl in September and Us says that she's dropped her post-baby weight by doing power yoga and eating four times a day. While singer LeANN RIMES has toned and tightened her tummy by jumping rope and cutting flour and sugar out of her diet.