Nicky Hilton, arriving at Pure nightclub at Caesars Palace dressed like Audrey Hepburn in "Breakfast at Tiffany's." Hilton, who hosted the evening, was joined by her parents, Rick and Kathy Hilton and cousin, Farrah Aldjufrie, who was celebrating her 21st birthday. Also at Pure: Rex Lee from "Entourage," dressed as one of the "Saturday Night Live" Spartan male cheerleaders. (Photo courtesy Scott Harrison/Retna)