As fans of Stephen Colbert and/or Rain are aware, there has been long-running "feud" between the two personalities, ever since the Korean pop megastar beat out Colbert in 2007's TIME online readers' poll of the most influential people of the year. Here's a clip from The Colbert Report a few weeks back of Colbert talking about this year's poll, where he trails Rain once again. I guess Colbert's Korean music video wasn't enough to boost him in the rankings.

On last night's show, the rivalry took another interesting turn, with Rain talkin' some smack back and advising Stephen not to quit his day job. Not backing down, Colbert opened a challenge to Rain for a dance-off. I love it. Personally, I hope Rain continues to kick Colbert's ass in the poll—he's just so much more entertaining when he's losing. You better bring it, Stephen.