For abs/obliques! It's hard at first and it's no fun but man you can feel it!! 4 sets of 20
5 Minutes to a Sexier Butt
Victoria's Secret Workout: Butt Exercises With Trainer Justin Gelband... I've done this in dance class when we have out conditioning sessions, and believe me, you feel it. And if you don't stretch, it'll feel like there's actually a knot forming in your a$$ cheek.
Audrina's 4 Moves for a Sexy 6-Pack
Audrina Patridges Workout consists of 4 moves for a 6-pack. Two or three times a week, do one set of 20 reps of each move in order without resting then repeat the entire routine once or twice.
A 10-Minute Standing Abs Workout - Fitness expert Jessica Smith leads this full-length 10-minute standing abs video workout that will keep your heart rate up as you target your abdominals (and more!) for even faster results.