Crafty stars are layering strapless numbers over T-shirts and tanks for a style that spans the seasons. Actress Brittany Snow wore a Marciano outfit to a recent store opening: "I like this look because it's classy and yet still casual," she said. "You can wear this to the office or a cocktail party." Stylist Alana Kelen recommends keeping accessories minimal. "Bold jewels are unnecessary," she says, "because the tank or T-shirt is essentially the extra detail." An extra detail that packs plenty of punch. Says Snow, "I like mixing it up—trying something new, yet still looking put-together."

—Betony Toht