Google Numa Numa and you will find a lot of sites that have the original music video. Pretty funny!! Also Wikipedia has information on it.
Go to this site for the words:
http://www.catteacorner.com/dragosteadintei.htm
A catchy little tune.
Did just that. Good take on it in wikipedia. Another one of those weird web phenomena. And it is pretty darn funny. Makes me appreciate the CS6 guys even more.