I foresee a Harvey column in the Onion, saying Numania! I've got it!
Here is a history of the phenomenon: http://joi.ito.com/archives/2005/01/18/ozone_madness.html
Originally it was a song by O-Zone from Romania, but I could not find a video of the original group. Yahoo will have to get that.
Here is the first Japanese flash version: http://ikari0310.hp.infoseek.co.jp/flash/maiyahi.html
Here is the second Japanese flash version:
http://csx.jp/~damemushi/il/maiyahi.html
Here is the version with the dorm kid singing it: http://www.funpic.hu/swf/numanuma.swf
Here is the lego breakdancers version: http://www.koreus.com/files/200407/lego-zone.html