The marketing blitz by SM Entertainment continues with the release of promotional pictures on f(x)'s official website for their upcoming NU ABO album promotions. Following the release of their album earlier today on May 4th, a slew of f(x) promotional pictures have been released to generate more hype ahead of their impending return to the music scene. You can't deny that the girls are really good with photoshoots like this and we wonder if they will translate this concept onto their stage performances. Stay tuned for their comeback stages this week, starting with Music Bank! [gallery]