Last night El Museo del Barrio celebrated its 15th birthday with a party at Cipriani's. So Fabiola Beracasa got her party dress on and hit the cocktail hour with a video crew. The theme was Quinceañera, the Latin version of an American sweet-sixteen party. Simon Doonan dressed for the occasion in an insect-patterned shirt, which he explains is very tropical and therefore Latin. Nicole Miller donned vintage Galliano which made Fab (and us) swoon. And of course Miss USA and Miss Teen USA donned their long satin gloves and glittery gowns. Watch and find out how long they spend getting ready and how often they wear their crowns.