SEE ALSO: The 'Ko Ko Bop Challenge' is becoming a trend internationally

J.Y. Park brought up how the 'Ko Ko Bop' challenge went viral internationally and the members stated how taken back they were at first because of its popularity.

Baekhyun said, "We were curious at first but the scale of the challenge started to get bigger. It was being featured on shows from places like the United States and Argentina. So we were taken back initially but we always want to say thank you to all the fans." 

Afterward, Kai showed a bit of the challenge as well. The first time he did it smoothly but the second time, he did it how fans in the videos would do it:

Check out the clip above!