Kristin Cavallari and Rumer Willis at Op Advertising Campaign Party jun2008

rs337795722178183.jpg rs495473722178183.jpg rs681565722178183.jpg rs398866722178183.jpg rs781749722178183.jpg rs498891722178183.jpg rs749273722178183.jpg rs965554722178183.jpg Kristin Cavallari and Rumer Willis are at Op Advertising Campaign Party in Beverly Hills.