Park Hae Jin is a Fan of f(x)′s Krystal.. When asked to name a female singer he would like to collaborate with, he hesitated at first, saying, "I don′t know if I should pick a singer I like or a singer that′s good at singing." The singer he likes turned out to be f(x)′s Krystal. "I′m such a big fan of you," Park Hae Jin said when asked to leave a video message to the singer. "I really want to meet you if I get the chance." cr:Krystal Krys Loft & f(x)DC