On the latest episode of Fantastic Duo season 2 , PSY and IU collaborate on stage to perform the song What Would Have Been . The song was from PSY sixth studio album and IU really shines . IU is known for her powerful vocal and considered as one of the best vocal solo singer in South Korea despite her young age .
Kpop star is big in collaboration and with their great chemistry during the show , maybe there will be a new song together by both of them in the near future ? We do hope so , Since PSY rough and manly voice really mixed well with IU .