Score a Celebrity Body in Four Weeks

Her workout: Power Pilates, a series of exercises -- performed on a mat or special apparatus -- that stretches and strengthens the abdominals, back, butt, arms and legs without adding extra bulk.

Check out: Power Pilates Foundation Workout, a 35-minute video of basic movements and mat-based exercises (including the famous "Hundred," a modified sit-up that's surprisingly tough). A chiropractor weighs in on how to adapt the exercises to accommodate past injuries or your body's own limitations. For a longer, leaner body, follow the routine three times a week.

Get it: www.power pilates.com ($21)