Five Moves to Get in Celebrity Shape

Celebrities have the best bikini bodies out there, and it's no secret that they get them by working out with top personal trainers, like Harley Pasternak. Author of "5-Factor Fitness: The Diet and Fitness Secret of Hollywood's A-List," Pasternak has trained some of the best-known bodies in the biz, like Hilary Duff, Halle Berry, and Jessica Simpson. That's Fit asked Pasternak to share his top five total body moves that he uses to get celebrities in great shape, so that you can, too -- without going to a trainer.

1. Dumbbell Dead Lift "Lady Gaga loves this move, she pushes her hips as far back as she can to really feel the stretch in her hamstrings," Pasternak said.

Place your feet shoulder-width apart and slightly bend your knees. Hold a dumbbell in each hand, placed between the front and side of each thigh. With your head up and shoulders back, slide your hips backward as you inhale. Keeping your weight on your heel and an arch in your lower back, allow the dumbbells to slide down your thighs. When you can no longer push your hips backward, exhale and begin to slide your hips forward, and your upper body and the dumbbells will follow.

2. Overhead Dumbbell Tricep Extension "Katy Perry really works hard on the back of her arms."

Lie flat on the bench with your feet up on the bench, tucked next to your butt. Hold a dumbbell in each hand, with your arms extended toward the ceiling and palms facing each other. Inhale as you hinge at the elbows and bring the dumbbells simultaneously down past your ears and toward your shoulders, then exhale as you press the dumbbells back to the starting position. Keep your upper arms still throughout the movement.

3. Skater Lunge "This one works Amanda Seyfried's butt big time."

Stand with your feet shoulder-width apart and hold the dumbbells, arms hanging straight down from your body with your palms facing each other. With your shoulders back and head up, inhale as you take a large step backward. Lower your body so that you create a series of 90-degree angles. As your back right knee nears the ground, exhale as you drive back with the muscles of your back leg to the starting position. Alternate after each rep.

4. Divergent Seated Cable Row "We work on Rob Pattinson's upper back posture."

Sit down in front of a cable resistance machine on a mat or bench with footplates. Put the pulleys at shoulder height and bend your knees. With the right hand grab the right pulley, and with the left hand grab the left pulley. Inhale as you pull both cables at the same time toward your belly. Complete the rowing motion, by exhaling as you release. Keep your back straight and perpendicular to the floor.

5. Seated Trunk Twist "Jennifer Hudson loves this one for what it does to her mid-section core."

Sit on the mat with your knees slightly bent and toes facing up. Lean back slightly with your upper body and keep your head and hips still. Exhale as you reach across your body with your right hand and turn your chest toward the left wall, then inhale as you return to center. Then exhale again as your reach with your left hand and turn your chest toward the right wall. Go to both sides for each rep.

Get more celebrity-certified moves from Harley Pasternak.