In the SBS variety show 'Family Outing - Kim Hyun Joong Edition Part 2' which was broadcast on 27 Sept, Kim Hyun Joong revealed: "When in USA, I went to night club together with Hyori noona, that was my first time to night club.", "On that day, the way noona dance made me very shocked, for the first time I felt ashamed because of Hyori noona."

So innocent XD but gee, man up!