Hottie actor So Ji Sub will be starring in a music video for rookie group Soya N Sun (lit. translation: ????). Soya N Sun has not debuted yet, but So Ji Sub had agreed to participate in the music video for their digital single song, Smiling Goodbye, and has just wrapped up filming for the it.  A representative reported that the filming was done outdoors in an unbelievably cold temperature of negative 20 degrees. However, the filming ended fine and So Ji Sub is fine so there's no need for fans to get neither worried nor upset. Soya N Sun is a rookie duo that consists of a female vocalist and a male rapper. However, N Sun (??) is not a complete rookie in the music world as he is a well-known rapper in the hip-hop scene. A representative of Soya N Sun stated, "With So Ji Sub, whose mere name makes hearts flutter, it has helped strengthen Soya N Sun's debut single with his participation in their music video." http://www.youtube.com/watch?v=AD-ZbPjn8Ng