f(x) brought their game to this week's Music Bank once again by performing their hit song NU ABO. They seem to be getting better and better every time they perform live as they show off their unique choreography. And with Victoria participating in more shows now and becoming a hot topic, more viewers are interested in what f(x) has to bring to the table. Check out their performance below! http://www.youtube.com/watch?v=_4OZ5osFXTI