“Just Dance 4”

"Making the most of their Tuesday evening, a bevy of beautiful people were in the house for the launch of Ubisoft’s “Just Dance 4” last night (October 2)."

(SOURCE: http://celebrity-gossip.net/party-pics/stars-show-%E2%80%9Cjust-dance-4%E2%80%9D-launch-party-737307)