David Letterman is retiring shortly, and his final guests have been pulling out all the stops.

First it was Tina Fey stripping down on his show, and now Howard Stern did his best to one up that. Stern made an appearance on the Late Show with David Letterman on Monday night and he tried to plant a kiss on Letterman, even though Dave was able to wiggle his way out of it.

After Monday night, Stern will have appeared on Letterman 19 times. Colbert definitely will have some big shoes to fill when Dave passes the torch.

[YouTube]