WHAT SHE WORE: Blair Waldorf wore headband with pearls and crystals on Gossip Girl season 6 episode 5

WHO: Leighton Meester as Blair Waldorf on Gossip Girl season 6 episode 5 "Monstrous Ball"
WHAT SHE WORE: black sequin dress with beaded headband with pearls and crystals
BUY: Dauphines of New York The One Headband for $80