The title pretty much explains it all. A part of the official opening video for the upcoming game has been revealed. The audio is pretty loud though, so lower your volume sliders before starting it.
As a quick reminder, the game is set to launch on August 30th. The PS Vita is also region free, so you can import a copy and play it on any PS Vita.
EDITED 8/9/2012 @ 2:10 AM PST: And the following video regarding additional track announcements has been uploaded just 10 minutes ago. Remember, you can see the full game track list of all announced songs so far on the project diva wikispaces.