f(x)'s Sulli and Seo In Young will be making surprise stage appearances for this week's SBS "Inkigayo." Sulli will be joining SHINee on stage for the performance of "Hello" in order to act out the theme of the song by receiving SHINee's love confessions. This is not the first time Sulli showed off her friendship with her seniors, having previously joined them on stage for the encore performance of the "Lucifer" Mutizen award. Seo In Young will be aiding PSY's comeback performances by joining him for his latest track, "Thank You." PSY commented, "We hope to create a more amazing stage by working with the audience." Inkigayo will broadcast on October 24th at 4 PM.

Source + Photos: Newsen