Wonder Girls - Tell me

원더걸즈 - 텔미

Wonder Girls - So Hot

원더걸스 - So Hot

Wonder Girls - Nobody

원더걸스  - 노바디
Sohn Dahm Bi - I must be crazy (I must be out of my mind)

손담비 - 미쳤어
Dancing Inmates' "Sorry Sorry" performance
Hey, if you like fast songs, you gotta check out Kim Gun Mo's "Wrongful Meeting".  It's fairly old but still considered to be one of the best in Korea.