On the August 29 airing of 'Video Star', Kim Chung Ha, Block B's Jaehyo, Crayon Pop's Ellin, Yeji, B1A4's CNU and Gongchan joined as the guests. 

During the show, Kim Chung Ha revealed, "I used to be a backup dancer for B1A4 before debut. It feels cool to meet them like this on a variety show." She continued, "Jinyoung sunbaenim wrote many songs for us during 'Produce 101'. I told him about how I used to be a backup dancer then. He was surprised and said he also told CNU sunbaenim about it as well. I've also met with CNU sunbaenim at a broadcast and he recognized me and talked about my backup dancer days. I felt grateful."

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To this, CNU blushed and commented, "I'm so happy that Chung Ha ssi didn't give up on her dreams and made it. I'm touched."