Beauty is pain!
The reality star posted a Snap of her legs after the event, and they looked like an annoyed cat had gone on the attack.
As with most of Katie's outfits, it's neither wow worthy or awful, it's just OK.
We don't know about you, but we're tired of the OKs and want our jaws to hit the floor for once! Sure, Letterman may not be the place, but still.
Maybe that should be Katie's resolution for 2013.
[Image via HRC/WENN.]