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