Blake Lively Busts Out Her Competitive Side on 'The Tonight Show'

Jimmy Fallon had no chance, bless him.

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Marie Claire cover girl Blake Lively showed up on The Tonight Show to promote The Shallows (AKA that completely terrifying-looking shark movie), and played a game of "Know It All" with Jimmy Fallon.

Only this was no mere "game" to Blake. Girl came to win. She also came armed with a bunch of not-at-all-nerdy Harry Potter knowledge (#hero), and called Jimmy Fallon out for saying "shit" on television.

Basically, she wiped the floor with him in the most literal way possible: 

Watch below to see Blake slay as Jimmy struggles to get in formation. 

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