Nov 05, 2011 5:28 AM GMT
That happened on Conan O'Brien to celebrate his 1 year anniversary with his show on TBS. Remarkable. It's believed to be the first legit wedding between two of the same sex on live TV. Correct if wrong. 
http://www.huffingtonpost.com/2011/11/04/conan-obrien-gay-wedding_n_1075414.html?ncid=edlinkusaolp00000009

http://www.huffingtonpost.com/2011/11/04/conan-obrien-gay-wedding_n_1075414.html?ncid=edlinkusaolp00000009