Where the Stars Shop

From L.A.'s hottest boutiques to N.Y.C.'s coolest stores, find out where Katherine, Jessica, Ashlee and more stock their wardrobes. Then check out our editor's picks on what to buy for your own star-worthy wardrobe. By Melissa Liebling-Goldberg

YIGAL AZROUEL

Hilary Duff must have stocked up on the Israeli designer's sexy little jersey dresses and well-tailored separates at his N.Y.C. flagship store. Good thing she has boyfriend Mike Comrie with her to do the heavy lifting!