Just for the record: Studio London is concocting a new title called DanceStar Party — Sony just forgot to mention it until today.
Naturally the game will have PlayStation Move support, as evidenced in the title's first trailer after the jump. The game's obviously born out of the SingStar franchise. Instead of focusing on music videos — which has long been SingStar's thing — DanceStar Party will have big character models occupying much of the screen. The music videos will still be there though, just less upfront.
With so many dance games available, DanceStar Party will try to differentiate itself by letting you create your own dance routines. Which is neat feature for budding choreographers we suppose.
There's a lot more about DanceStar Party over on the PlayStation Blog.