For those wondering, the music is a medley of various theme songs from Anime and video games. Just some of the ones I recognize: Opening to Lucky Star, Yu-gi-oh, ending song to Haruhi, Noir, Digimon, a song from Super Mario RPG, another from Super Mario World, a couple songs from the Mega Man series, the opening song for Bokurano, as well as Air, and near the end there was the song Haruhi performed at the cultural festival, of course a selection from Final Fantasy