How to Get Abs of the Stars.

Shape.com's Janet Lee shares an easy modification to the conventional crunch that will have your abs beach-ready in no time. Says Lee, "When you do regular crunches, you feel them mostly in the upper part of your midsection (near the bottom of your sternum), but you'll feel this whittler below your belly button."

• Lie on the floor, face up. Make sure there is some sort of an "anchor" nearby -- a pole, furniture leg, or other sturdy object, she says.
• Bring legs up directly over your hips at a 90-degree angle to the floor.
  
• Lift your hips slowly, bringing your toes toward the ceiling. Slowly lower your hips.
  
• For best results, Lee says, complete 3 sets of 15 reps. See Shape.com for in-depth instructions, including a diagram.