One-shoulder taffeta dress

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ML Monique Lhuillier Bridesmaids One-Shoulder Taffeta Dress
This dress's boned bodice ensures you'll look slim (and stand up straight!) as you precede the bride down the aisle. It also has a flawless wedding pedigree: Its designer, Monique Lhuillier, is a favorite of celebrity brides and specializes in designing figure-flattering dresses and gowns.

$178; Nordstrom.com