Group Super Junior's Kim Heechul transformed into f(x)'s Sulli for April Fool’s Day.

On Sunday Kim Heechul posted on his Twitter, "Hello! This is f(x) Sulli!" along with a picture.

The picture was not of Kim Heechul but of Sulli. In celebration of April Fool’s Day, Heechul even changed his Twitter name to 'Sulli.’
He then mentioned to Eunhyuk, "Thank you for always taking care of me! World's Anchovy Eunhyuk!” bringing laughter to internet users.

Internet users who saw this commented, "Kim Heechul is so funny~," "Is Sulli watching?", and "I really thought Sulli started using Twitter.”