This Hayley Williams photo contains
robe de cocktail, gaine, demoiselle d'honneur, demoiselle d’honneur, robe de dîner, formel, robe de soirée, and formelle.
There might also be
robe, robe, nuisette, shimmy, changement, glisser, nounours, chemise, slip, teddy, déplacement, and glissement.