classic rock: pink floyd, hendrix and teh experience, the beatles, lynyrd skynyrd, eric clapton

rock(all categories): rise against!, red hot chili peppers, papa roach, sum 41, incubus, sublime, metallica, the offspring(mostly smash and ixnay on the hombre), tool

rap/hip hop/reggae: bone thugs, ludacris, eminem, matisyahu, bob marley, sean paul

acoustic: OAR!!!!, ben harper