User:ParkingStones/Numanuma
Numanuma is a strong Internet meme based around a catchy Romanian techno song called Dragostea Din Tei by O-Zone, a Romanian band.
"Numanuma" specifically refers to a Flash-based video of 19-year-old Gary Brolsma of singing along energetically on his webcam. All traces found so far seem to be clipped and out-of-sync near the end of the song.
Gary Brolsma first posted his "Numa Numa Dance" on Newgrounds.com [1]on Dec. 12, 2004. Since then it has pop-up on over 80 site and has made appearances on CNN and VH1's "Best Week Ever."
Gary Brolsma is a New Jersey teenager from Saddle Brook, New Jersey. Brolsma, reportedly, is quite happy with his fame.
There are a number of other videos using the song, including several Japanese cartoons and a Lego dancing video.
Joi Ito has a good post discussing this current and growing meme.
See also: Internet phenomenon