To celebrate its 10-year anniversary, Opening Ceremony held a good old fashioned rager at New York's Webster Hall on Sunday night. Everyone from Kristen Dunst to Paris Hilton showed up, and circulated between three floors. Each room was themed as a party from the last decade, including Club Luxx, the Misshapes, and 1992. But the real surprise occurred at 2 a.m, when rapper Lil' Kim surprised guests with a performance.