I'm not so sure you can say that it was "obviously a rush job" because a game like that doesn't require nearly the work to produce as conventional games, and it is possible that she was just choosen to endorse a product that was already in development.
Personally, if I was working on a fitness game for the Wii I would probably do a WiiWare game that had downloadable content for it; every week or two release a new aerobics program (or whatever) that includes different songs to mix-it-up.







