yash, M.IA is kool. she has her own little style, I respect her creativity. her music is very odd though, the genre varies from track to track on her album(s) not all the time for the better. regardless, the girl rox and hope to hear more from her soon.
but to contribute to the site:
Ellegarden- these guys are kool, very fun and zany group. their an azn band that rocks out in english

I don't quite understand it either but for some reason they have perfect American accents...i dont even think they've been to America not once. ANYhoo, my boy Do [dough] turned me on to them. he puts me in the loop on anything thats hot over seas. some few more bands from over seas I would refer are bands like....
Snowkel- they have a real all-american rejects feel, except probally with better music structure.
Chatmonchy- these girls ROCK. their at a tie with the 5,6,7,8's for my fav all girl band. (sorry, but the dixie chix don't make the list). they also did the bleach ending song "Daidai", just think back to the only one that had a girl rocking to the vocals. I believe it was during the era where orihime first got caught by aizen.anyhoo, kool chicks.
and I think thats about all i can name just speaking off the dome. now these bands are pretty difficult to download music from so the best way (or fastest) to listen to them would be youtube believe it or not. youtube pulls through, just type in the band and they'll have tons of music videos listed of them.