HBO's Game of Thrones has become a world-wide sensation, and so has its main theme song. Composed by Ramin Djawadi, this list is comprised of the best covers of the song found on the internet. (Not to be confused with the great original songs based on Game of Thrones.)Some are epic, and some are silly, so listen to them all and cast your vote. Let us know which covers deserve the biggest audience, and which ones not so much.