David Letterman bids farewell to the Late Show on May 20, but before he signed off, a certain song-and-dance man had a special message for him. Stage and screen favorite Nathan Lane took the stage on May 5 to perform a tune, with the help of songwriting duo Marc Shaiman and Scott Wittman. Over the years, Lane has told Letterman that he feels “dead inside,” and he’s pretty sure Letterman knows the feeling. Take a listen as Lane performs the hilarious anthem, with Shaiman at the piano, then catch the two-time Tony winner in It's Only a Play at the Schoenfeld Theatre.