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On the second episode of 'Sugarman 2' which aired on January 21, Gummy and Melomance were the respective guests to perform for the audience and viewers alike. Before doing so, however, Melomance member Kim Min Seok revealed why he wanted to come on the show. He shyly said, "It's because I really like Red Velvet and their song 'Peek-A-Boo'...I even listen to it while showering. I'm just really nervous." Gummy pointed out his facial expression changed as soon as he started speaking about Red Velvet. Afterward, Joy sang a bit of the song for Melomance and everyone else in the studio.

Check out the segment in the clip above.