Microsoft and Harmonix have just announced Dance Central 3 with a live performance by Usher.

The Microsoft press briefing has been taken over by a performance by Usher, helping to reveal the latest game from Harmonix, the creators of Guitar Hero, Rock Band, and the first two Dance Central games. 

The extensive and lengthy dance sequence starts out with just a stage performance, but before long the screen behind him cuts to scenes of the same song being played in Dance Central 3. 

After the performance, Usher departs the stage without offering any additional details about the game. We'll have more information about Dance Central 3 later this week.