Looks like Robert Pattinson is giving this lucky fan some lip biting lessons!
Can you say Cute?
Check out the Source if you want to see what she learned from Kristen!
ETA: I'm totally not as good as Tink at this but I'm gonna take a shot.
Going by the length of his hair, the scruff (VERY Important) and what he's wearing and also using the pic of what Kristen is wearing (coz they were obviously taken the same day/night) that it was taken at the Jimmy Kimmel "Total Eclipse" Special on June 14th 2010
And here he is preparing (on that night) to give lessons!