This is a montage of Kristen Stewart biting her lower lip.  She apparently does this on such a regular basis that a montage could be created and posted to the internet.

Mememolly posted this on her twitter.  I think Molly finds it annoying.  I like it!  Watching this leads my brain quite easily to the idea of Kristen Stewart performing oral sex.

Kristen Stewart
Mememolly
Blowjobs
Twilight