When f(x) become guest in SBS Power's FM Cultwo show, Krystal been asked whether she keep contact with her former co-actor in High Kick 3, Lee jongsuk. Well, we all know that Jongsuk have been the most hottest actor in 2013 now. She answer that she still contact with him. Which her answer drew attention oh her fellows in f(x) and the DJ.

But she answer honestly that she haven't watch Jongsuk's drama I Hear your voice yet.