Nine Muses joined the Hip Hop duo Krispy Krunch on stage unannounced during their performance, surprising fans and the performers alike.

In the middle of Krispy Krunch's performance of "Boss, Nice Shot!" Sera, Yisam and Son Sung Ah came on to the stage.

Krispy Krunch's management company stated, "The appearance of Nine Muses was not planned so it was very surprising and confusing at first. But the fans had a lot of fun with it so we were able to put together an even greater performance than usual. We thank the spontaneous guest appearance of the members of Nine Muses."

Via Twitter, Son Sung Ah remarked, "The song was so exciting that we had to get on stage."