Perfume is my favorite singing group of three Japanese girls. You can enjoy their Youtube.
Polyrhythm
http://www.youtube.com/watch?v=KbiSxunJatM
Night Flight
http://www.youtube.com/watch?v=oqo3P4B0lUE
Chocolate Disco
https://www.youtube.com/watch?v=1WTy2yqKI4w
Love the World
https://www.youtube.com/watch?v=75hg0XFVByw
