If she's into dancing, then she'll probably like a lot of more active games.
Wii Fit
Wii Sports Resort
Dance Dance Revolution (need a dance pad with that)
Just Dance (actually shows dance moves and stuff)
and maybe Boogie Superstar?
I need a really great song that's both motivative and inspirational for a sports video. A song like "The Art of Losing" by American Hi-Fi would be awesome.
