They love the beat, the dancing and the costumes!
The other night it was bath time and the kids were just off the wall and I was alone. I brought the laptop up to the bathroom and played the video/song and they just stopped. They came to the bathroom, and had a bath while listening to PSY. It worked wonders and really helped me out!
Gangnam Style by PSY
http://www.youtube.com/watch?v=9bZkp7q19f0
The song is so fun and don't worry moms and dads although the lyrics are in Korean, there is an English translation and there is nothing rude or swearing.