It seems that something is going on behind the scenes with f(x). Their schedule was previously filled with performances on music programs, but now it is completely blank. Some netizens have suggested it may have been a mistake, or a computer glitch, but after the schedule was cleared, they haven't appeared on the music programs they were to be scheduled on. Moreover, Sulli has been consistently missing from f(x)'s performances. SM Entertainment previously stated she was suffering from a severe flu, but that excuse doesn't have a lot of people convinced, especially since a picture of her on Instagram of her and her friend was found recently. (see second photo) What's going on?!