Jung Joon Young and Roy Kim revealed their best friend relationship.

In Mnet "Super Voice Show" aired today, Roy Kim sang the song 'With the Heart That I Need to Forget.'

Jung Joon Young, who performed before Roy Kim, introduced Roy Kim onto the stage. About Roy Kim, he said "He's a little shorter and a little uglier than me. But he will be the main star of this stage," arousing laughter. The two were known to be best friends in real life.

Photo Credit: Mnet