Tina Fey proves her respect for David Letterman with her actions. Despite her apparent disdain for fancy dresses, she showed up wearing one on last night's episode of The Late Show. She said she only does this for Letterman, which isn't exactly true, but we'll roll with it for the sake of the bit. Regardless, she said she's going to retire fancy dresses for Letterman. And to prove it she took the very one off her back, revealing a special set of underwear with "Bye Dave" on the front and "#Last Dress Ever" on the back. 

Dave, for his part, is blown away. He reacts exactly how you'd expect an old man to react to a younger, half-naked woman.