You almost needed dark glasses at the fall shows—the evening looks were that brilliant. So instead of staying in the black, let yourself be looked at in a dazzling peacock dress (Byron Lars Beauty Mark, $475). Helen Phillips is so ready to be noticed: She lost 140 pounds, going from size 22 to 2, on the seventh season of NBC's weight loss marathon, The Biggest Loser (season eight premieres September 15). "I hadn't worn a dress in eight years," she says (her closet contained 30 pairs of black pants), "but I must say I look hot in this!" Not because it's ultrashort or revealing, though—the elegantly gathered sleeveless bodice and soft, pleated skirt show off her body, but discreetly. Now a motivational speaker ("My message is that you're never too old to change your life"), Helen's self-confidence shines even brighter than her dress: "I feel like nothing can stop me."
Shoes, Jimmy Choo.