On January 18, the members of Wanna One guested on the 'Sing My Song' segment of 'Happy Together 3'. 

Bae Jin Young, who was the youngest member on the set, brought laughter as he dissed the hyungs. First, he talked about Kang Daniel and said, "He might look dependable but he's actually like an elementary kid. He has a young sense of humor. His laughing code doesn't really fit well with me."

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Next Bae Jin Young said, "Hwang Min Hyun and I have gotten close lately. And that must be why he overreacts sometimes." To this, Hwang Min Hyun replied, "I like skinship. I was only like that because dongsaeng is so cute but I must've been overwhelming.."

Bae Jin Young then talked about Kim Jae Hwan and said, "Kim Jae Han is old. He's like a school principal." Lastly, he mentioned Yoon Ji Sung and said, "There aren't any awkward hyungs among the members but it gets silent when I'm alone with Yoon Ji Sung."