It has recently been brought to my attention that there are still some people who have not yet been exposed to "The Horse Dance".
The video that started it all:
PSY on CNN:
PSY brings The Horse Dance to Dodger Stadium!!
Nelly Furtado does The Horse Dance in Manila:
Pony Gangnam Style:
Also, the Gangnam Style entry at "know your meme" is pretty awesome:
http://knowyourmeme.com/memes/gangnam-style