Look Great in '09

10 Best BodyWatch Tips of 2008

J.Lo! Kate! Get the scoop on how to look – and feel – fab like the stars

2. BE PLAYFUL

Heidi Klum credits her svelte figure to chasing her active kids – Leni, 4, Henry, 3, and 2-year-old Johan. "When I'm not shooting Project Runway, I'm in the park with them," the supermodel told PEOPLE in June. "They're like roaches when you turn on the lights and they run in different directions." Ordinary activities really can burn calories: For example, dancing around for 20 minutes with your little ones can shave off 120 calories. Read more everyday tips for trimming down on Health.com. – Jeffrey Slonim