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."