The two will be appearing alongside one another for the third concert of Lotte Card's "Lotte Card Move: Soundtrack" music series, which is set to be held at Olympic Park's Olympic Gymnastics Arena in Seoul on September 29.

While this is the first time the two will be holding a concert together, it is certainly not the first time they have collaborated. In January of last year, Psy produced Rain's single "The Best Present." They have also appeared as special guests at one another's concerts before.