Anna does battle against actor John Krasinski and figures out the perfect way to shake his confidence – sing "Steal My Girl" (er, lip sync it) with images of Jim's beautiful wifey, Emily Blunt, popping up on screen.
Anna brings some comedy to the performance, even revealing her t-shirt with a pic of her and Emily snuggled up in a heart. Well played, Anna. And John's reaction is pretty amazing too.
If that's not all impressive enough, Anna gets a little help from Jennifer Lopez on her performance of "Booty." Will it all be enough to defeat John, who we've seen prancing around in a Tina Turner fringed mini dress for his "Proud Mary" performance? Keep in mind, John and Emily invented this game!
Lip Sync Battle airs Thursday at 10 p.m. ET on Spike.
UPDATE: Full video of Anna's "Steal My Girl" performance and John's amazing NSYNC "Bye Bye Bye" lip sync: