What from K-on are you looking for?
---------- Post added 2013-02-03 at 11:57 AM ----------
Since it's Asian Music and not only pop it's time to link some glorious Maximum The Hormone! Anyone having seen Death Note should recognize one or two songs from here, and should definitely check out the MV for Zetsubou Billy.
Buiiki Baesu!!
Zetsubou Billy
Louisiana Bob
Bikini Sports Punchin
What's Up, People?!
Chu Chu Lovely Muni Muni Mura Mura Purin Purin Boron Nurururerorero
Koi No Mega Lover
Kuso Breakin Nou Breakin Lily
Minoreba Rock
I'd settle for fewer songs but these are all so good :3 Also, female drummer and she sings at the same time!