Crescent-moon and star designs shone during the twenties and thirties; channel that era's easy glamour with this photo backdrop. To make, cut foam board into a crescent shape, spray with glue, blanket with glitter, then hang with fishing wire. Gown, by Marchesa, and silver dress (FD306), by Naeem Khan; from Neiman Marcus, neimanmarcus.com. "Pigalle Strass" stilettos, Christian Louboutin, christianlouboutin.com. Suit, Duncan Quinn, duncan quinn.com. "Moonlight Crystal" necklace, H.Stern, hstern.net.