She came to win, and took no prisoners.

Lively was on 'The Tonight Show with Jimmy Fallon' to promote her new movie 'The Shallows' in which battles with a shark and it seems like the shark has rubbed off on her in this showdown with Fallon in a game of 'Know It All'.

She may be all smiles but that's a shark-like grin if ever we saw one. We feel like Blake is not the type who takes losing easy, and has probably never lost a thing.