I need some new bands to listen to, any suggestions?

i'm going to list most of the artists on my ipod and ask that if you like one or more of the same artists as i do, that you suggest some new stuff for me to listen to. (the ones in all caps are my favorites): afroman, the beatles, BOB MARLEY, common, crystal castles, cypress hill, digable planets, fergie, fiona apple, the fugees, GORILLAZ, ice cube, imogen heap, jack johnson, the killers, lady gaga, lmfao, mgmt, mindless self indulgence, modest mouse, no doubt, PEPPER, RADIOHEAD, snoop dogg, the strokes, SUBLIME, A TRIBE CALLED QUEST, violent femmes, the xx