LAS VEGAS - OCTOBER 06: Paris Hilton (L) and her sister Nicky Hilton arrive at the Tangerine Lounge & Nightclub at the Treasure Island Hotel & Casino during the club's two-year anniversary party and the grand opening of the Social House restaurant October 6, 2006 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) *** Local Caption *** Paris Hilton;Nicky Hilton