"To keep the girls from running over, you must wear the right-size bra," says Blakely. Adds Shannon: "Full-coverage bras—as opposed to demicups—are best. And make sure to adjust your straps. If you lengthen them a bit, you can Avoid that line."
Too-small bras, clingy tops in jersey or silk.
Sweater, Mai. Earrings, Kara by Kara Ross, Henri Bendel, 800-423-6335. Ring, Fantasy Jewelry Box.