Richard Simmons on Letterman Tonight

One of my favorite things about summer vacation is being able to stay up to watch late night talk shows.

Earlier in the week I learned that Richard Simmons is on Letterman tonight. If you've ever watch him on Letterman, you know that there is some interesting chemistry between him and Dave, and I'm sure tonight will be no exception.

This isn't a clip of one of Richard's past visits to the Late Show, but it's the SportsCenter commercial that he did a while back, which I thought was hilarious.