f(x)’s 4th album “4 Wall” and the music video of their lead track “4 Walls” have been released. Listen and download on iTunes & Apple Music https://itunes.apple.com/album/4-walls-the-4th- f(x) Official http://fx.smtown.com http://www.youtube.com/fxsmtown http://www.facebook.com/fx.smtown f(x) 에프엑스 '4 Walls' MV ℗ S.M.Entertainment
![f(x) 에프엑스 '4 Walls' MV](https://cdn-ak-scissors.b.st-hatena.com/image/square/8fa6576f53326dc95c9590bb80fd5b7674d0bad6/height=288;version=1;width=512/https%3A%2F%2Fi.ytimg.com%2Fvi%2F4j7Umwfx60Q%2Fhqdefault.jpg)