On the upcoming episode of KBS 2TV's 'Immortal Song 2', 4men's Shin Yong Jae's mother will make a guest appearance and stand on the stage with her son!

For the 'Jo Ha Moon' special recording, Shin Yong Jae sang the ballad, "You Who Knows My Pains", with the help of a choir. It turns out that one of the members of the choir was actually Shin Yong Jae's own mother.

After the performance, the MC and guests had to guess which lady in the choir was the singer's mother. After being discovered, his mom had the audience laughing with her witty personality and brought enjoyment to the show.

Shin Yong Jae's first ever collaboration with his mother will be broadcast on the October 6th episode.