The coolest look sweeping down Hollywood sidewalks is a smocked maxi dress with '70s flavor. "Smocked dresses are just easy to wear," says Jessica Simpson. "You can throw them on in a hurry and still look fashionable." Her floor-length Nui dress was just right for a night out with friends. "[It] is the perfect summer dress," says Simpson, describing it as "the color of a dreamsicle." Pair a smocked gown with wedges and a pair of hoops for a day to night look. "I live in them in the summertime!" says Simpson.

BUY ONLINE NOW
Get Jessica Simpson's Nui dress, $220; at shoprobertson.com.
Get Eva Mendes's Juicy Couture dress, $198; at neimanmarcus.com.

—Betony Toht