Nothing says glam rock like purple metallic. A small slice of it — see Anna Kendrick's shoes — is otherworldly cool. Her ruched Elise Øverland LBD is pretty rockin', but her Jimmy Choo "Darcy" sandals make it. If it weren't for the dark jolt of color, her outfit would have been ordinary red carpet fare. There are many purple metallic options, sing it loud or sing it softly. Either way, rock the night away.