We all knew that their win from yesterday's M Countdown was just the beginning.
Staying true to that, f(x) has just received their 2nd '4 Walls' win from this week's Music Bank. Enjoy their winning performance below~
Release Date: February 28, 2017
Release Date: January 17, 2017
Release Date: June 28, 2016
Release Date: December 10, 2016