Get abs like Faris with her favorite abdominal moves.
Place a triad ball behind the small of your back, keeping your knees bent and feet flat. Place hands behind your head, looking down at your belly button, lift forward and release back down. Repeat 15-30 times.
Work your obliques (side abdominals) with a variation of the same exercise.
Stay in the same position, hands behind head, lift and cross over to the left side, repeat 15 times and switch sides.
Finish with a backbend over the ball to stretch your abs.
Purple triad ball, $13.95, pilates.com
"I love using the triad ball," says Stuart. "It really helps you pull into your core and you can do tons of exercises with it to tone your buttocks, arms and shoulders."