Brook and TV personalities Rickie and Melvin joined hundreds of dancers and shoppers as they transformed London's Westfield shopping centre into a dancefloor.
Little Boots, whose song 'Meddle' features in the game, also performed a special DJ set at the launch.
Brook said: "Dancing with Rickie and Melvin to Dance Central 2, with Little Boots DJing, was so much fun. Who knew the boys had it in them, they could be on Strictly."
She added: "It was amazing to see hundreds of dancers and shoppers clapping and cheering along. I want to do it all over again!"
Dance Central 2, which launched exclusively on Xbox 360 last week, adds 40 new tracks, enhanced Kinect voice support and features simultaneous multiplayer for up to two people.
> Read our review of Dance Central 2
> Kelly Brook launches her own perfume
View Kelly Brook and Little Boots at the Dance Central 2 launch event below: