Rebecca Vallance designs the kind of clothes she'd want to have in her own wardrobe - only the pieces she truly loves make the final cut. Cinched with a crystal-embellished belt, this 'Tiffani' gown has a tulle bodice flocked with dainty polka-dots and a smooth crepe skirt that gently flares out at the floor-sweeping hem. The plunging neckline is fitted with a sheer panel for modesty, while the open back has ties to keep it in place.