Stars' Summer Style

If you want lean muscle like Nicky Hilton you'll need to get that heart rate up. "Cardio is key for burning away those excess calories," says trainer Teddy Bass. "Try 25-40 minutes, three to five days a week varying the workout between treadmill, arc trainer, elliptical or even outside hikes, biking or a good run." Challenging your body with an ever-changing workout will give you the lean look you need for bikini season.