The new issue of Us Weekly features “The Hills” star Lauren Conrad as one of their fittest celebrities.

The issue also includes “American Idol” and “Celebrity Fit Club’s” Kimberly Locke, “Dancing with the Stars” host Samantha Harris, singer LeAnn Rimes, and “Entourage” star Debi Mazar.

Just how did Lauren Conrad and these other famous ladies get in shape last year? Each shares their diet and exercise secrets. Lauren Conrad, for example, eats just 1,500 calories a day with six mini-meals, hits the treadmill and weight trains twice a week.