Jonathan and I have concluded that, in our opinion, the best tribute we've seen to Robin Williams is from one of his fellow Comedy Store contemporaries, David Letterman.

Robin Williams was always a knockout guest on Dave's two late night show incarnations and if you missed it, I chronicled my favorite all time TV appearance last week.

Getty Images/Kevin Winter

Next week at The Emmy's, Billy Crystal will honor Robin Williams and if it's half as funny as this Comic Relief piece, we should all be counting down the minutes to it.