Demi Moore/Ashton Kutcher: The cougar-hedgehog comments are so 2006. What we love about Moore and Kutcher is their commitment to fitness. For his role in "The Guardian," he said, "I worked very hard with a trainer to get into good physical shape because I didn't want to represent these Coast Guard (officers) without emulating them physically -- and their physical condition is second to none." As for Moore, she's taken fitness seriously since "G.I. Jane" and "Striptease" and continues today, mixing cardio with combo exercises like lunges with weights. (LAN/Retna Ltd.)