The video's long, you don't have to watch the whole thing. Basically, a Cpop group Lollipop F from Taiwan came to Star King and had a fun dance battle with Suju. No one's better than the other :D 

But what gets my heart racing is when Ryeowook starts singing Teresa Teng's classic near the end. I'm friggin jealous of the girl whose hand he held and sang to >.< xDDDD I really want him to sing that song to me someday *dreams* xDDD And the moves that Ryeowook busts are so epic! I just love him so much!