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:
This content is imported from Third party. You may be able to find the same content in another format, or you may be able to find more information, at their web site.
Watch below to see Blake slay as Jimmy struggles to get in formation.
This content is imported from YouTube. You may be able to find the same content in another format, or you may be able to find more information, at their web site.
Follow Marie Claire on Facebook for the latest celeb news, beauty tips, fascinating reads, livestream video, and more.
This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io
![](https://hips.hearstapps.com/hmg-prod.s3.amazonaws.com/images/gettyimages-104858132-1620729900.jpg?crop=0.913xw:0.297xh;0,0.0750xh&resize=480:* ""Gigli" California Premiere")
