Y.M.C.A. http://youtu.be/CS9OO0S5w2k
In the Navy http://youtu.be/InBXu-iY7cw
Go West http://youtu.be/1wc-AQJ2MYo
No list of Gay Anthems would ever be complete without these three, but I was so furious with the bastards for disabling embedding that, for a while, I thought I should exclude them.
