Kim joined a group of celebrities that consisted of Carmen Electra, Lindsay Lohan, Tony Romo, and ex-boyfriend Reggie Bush for Cameo Stars: A Facebook media app that features celebs virtually delivering personal messages to user's Facebook friends. She became an instant fan-favorite and was plastered on every male's Facebook wall, but it was her outtake videos that sent viral waves. I mean, who doesn't love watching a looped shot of Kim slapping her ass? Exactly.