In her new movie Bad Teacher, Cameron Diaz makes being bad look so good. Talk about rocking the short shorts! We met up with her longtime trainer Teddy Bass to learn Cameron’s leg-toning moves. Here are three exercises that will get your stems in Hollywood shape. For an extra challenge, Teddy likes to add a squeezable ball (in the Fall, keep a lookout for Teddy’s own line of exercise balls) to his workouts. Check out his moves when you watch the video.