"Katy Perry's Vegas Show Features Surprise Guests and Fashion Statements"
Paris Hilton attended Katy Perry's Las Vegas residency wearing an all-black outfit consisting of a lace bralette, sheer zip-up jacket, leather pants, and black boots. She accessorized with silver-toned studs and a black hat. Hilton recently released her autobiography, "Paris: The Memoir," and has become a fashion icon since the early 2000s, starring in campaigns for Lanvin, Marc Jacobs, and Guess.