Having fun at their waiting room, here are f(x)'s Amber and Victoria.
Check out their playful photo below~
Meanwhile, f(x) will be making their comeback on today's Music Core with '4 Walls'.
Release Date: June 28, 2016
Release Date: December 10, 2016
Release Date: May 17, 2016
Buy SNSD's 'Phantasia in Japan' DVD/Blu-ray