B2ST member Son Dong-woon showed his support for Yoon Hyun Sang of 'K-pop Star.'

On March 11th he posted on his Twitter "K-POP STAR Hyun Sang is a friend I knew for a little while before but he transformed so much and looks good! I don't know if it will be any help but please send in a little vote."

On today's broadcast of SBS 'K-pop Star' Yoon Sang Hyun performed the song 'Whistle' why Lee Moon Se.

Song Dong-woon was a JYP trainee in the past and Yoon Hyun Sang has been voted top in JYP online audition.

On the other hand, Kim Na Yoon got eliminated from the show today.

Photo Credit: SBS