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The Fit 5: Tips to Feel (and Look) Like a Star!

From Jessica Simpson's down-low exercises to Julia Roberts's water workout, get the scoop on how to look fab like the stars

WORK FOR YOUR WEDDING DRESS

To make sure her body is wedding-ready for her upcoming nuptials with fiancé Hayes MacArthur, Ali Larter has been whipping herself into shape several times a week at Barry's Bootcamp in West Hollywood. Trainer Barry Jay's drill sergeant-style class – which has also drawn such celebs as Katie Holmes and Taye Diggs – includes strength-training exercises with resistance bands, treadmill work and challenging floor exercises for a total-body workout. If getting in shape for your wedding is on your to-do list, try Health.com's high-intensity workout! – Thailan Pham