Super Junior's Kim Heechul has strike again on his Twitter and after going on a uploading frenzy involving f(x) members in the past few days, he has broken that link by uploading a picture of himself with SNSD's Yoona this time. On May 18th, Heechul uploaded the picture of himself and Yoona posing during a break in their Family Outing 2 recording as he wrote, "Yoona, the girl with an amazing beauty-to-attitude ratio and face that is prettier without any makeup on. We call each other names like "granny" and "middle-aged", but she is the prettiest celebrity I've met. We're friendly arch-enemies," showing their friendship. Netizens commented, "Are you trying to do a collection together with SM girls?" "Yoona onni a bit pretty than u Heechul oppa," "I don't like u with Yoona.... but i like u with Amber," "Cute .. :) enjoy the family outing ^^." I wonder if there would be a selca with Sohee?