http://www.youtube.com/watch?v=9bZkp7q19f0Psy in the first gangnam style video
milki it is a K-pop(Korean) hit, done by PSY(his stage name) and the dance style is based on horse riding(and lariat twirrling-spinning a rope loop over yer head like cowboys do) and flash mobs all over the world are doing it...hence Roy Hibbert and area 55 folk doing it...which is where i came in
there are tons of videos of Korean women dancing to all sorts of songs, a few of em have even caught my eye on YouTube, but it is usually just one woman doing a song in her apartment or a studio, so 5 of them doing one is unsual. seems to be an outlet of some sort for great looking Korean women/girls to do utube dancing...sort of a safe exhibitionism maybe? some of them can really dance, not to mention being very easy to look at...damn i may be on the road to perdition(becoming a dirty old man)