Audrina Patridge's Workout consists of 4 moves for a sexy 6-pack: Cat Raise, Cross-Legged Lift, Compound Crunch, and Offset Bridge. 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. I really will do this. I must, I must.
Also on these boards
Do these 4 moves in a row 10 reps each x3 for a great mid section