Jennifer Aniston was a guest on last night's episode of Late Night With Jimmy Fallon, and it was a nice little reminder that Aniston is, at the end of the day, a pretty funny lady.

During a Lip Flip segment, after inexplicably giving each other southern accents—Jimmy slips in a mention of Billy Bob Thorton, which briefly throws Jen off her game—the two get into a super-serious debate over who will win the Super Bowl. Check out the full video below: