SEE ALSO: Hyunseung asked to choose between U.JI and HyunA on 'Immortal Song 2'

U.JI caught the guys on set off-guard with her sexy hip shaking and was followed by Hyunseung who got into the music with his own strong and hilarious moves. Their matching white outfits and dancing skills made them look good together. But MC Moon Hee Jun thought Hyunseung was more focused on the music than on U.JI, commenting, "The way I see it, Hyunseung didn't dance to attract a woman's interest. He danced because he liked dancing."

Check out their sexy couple dance!