On both sides about 40 reps: take your arm and curve it above your head. bend to the side so you can feel something in your waist. Bend as far to the side as you can, and then go back up straight. Do the same for the other side. My cousin does this and she has this wonderful waist! Keep the movement straight as possible with a smooth movement, yet stiff.
well im trying it out to see if it works out