As you saw with Tina Fey and the last fancy dress she’ll ever wear on Letterman, many women that make an appearance on a late night talk show go through a bunch of hoops, specifically in regards to their looks and what they’re wearing, in order to promote their movie, tv show, etc. 

Inside Amy Schumer’s latest sketch summarizes the phenomenon with a little NSFW exaggeration pretty well.

Also, seeing Bill Hader as late night talk show host caricature is pretty great too.