On last night's Late Night With Jimmy Fallon, the host revealed an ongoing YouTube feud between Twilight's Robert Pattinson and Harry Potter's Daniel Radcliffe. ("Newsflash: I died when I was 17, I'll be 17 forever. You're 20, that's stupid.") Fallon is best when he's doing impressions, and this clip doesn't disappoint — he even does different English accents for each character. And dare we say his "Pattinson in a tree with blow-up doll" is nothing less than inspired?