This has long been one of my favorite moments in television history. I first caught this being re-run in the late 80s and it's been a favorite ever since.
Nastassja is here promoting Exposed and is having a great time messing with Letterman.
Unfortunately this isn't the full interview but I'm thankful that some wise soul posted at least part of it on YouTube.
Missing parts, of what was a long interview, include her entrance with Letterman visibly shocked by her hair, discussion on her rumored affairs, talk on Exposed and her passionate defense of Roman Polanski.
I love this clip.