One source claims the 18-year-old was actually bullied for being there -- apparently not everyone thought she earned the right to walk the shows!
The insider spilled:
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.]