Okay um well . . .
Most of the stuff from FF VII and KH, some stuff from FF VIII, X, X-2 and XIII, most stuff by Within Temptation, music from Zelda, anything composed by Howard Shore (Lord of the Rings), some Greenday here and there, the occasional song by Bon Jovi, Leona Lewis, as well as Highschool Never Ends, Lollipop by Mika, Blame it on the Pop by DJ Earworm, Sun Goes Down, I Believe by Ayaka (Why from FF VII CC) and some other songs by Hikaru. Sorry that I couln't limit it down to just one but there re about ten others I don't want to list (in fact I'm just too lazy to list)