That's right, Perry lost the trivia game about herself to a fan named Emily.
Emily beat Perry on several questions like how many Twitter followers she has and how many Grammy nominations she's received. Emily even beat her to the buzzer when Kimmel asked the name of her parents.
Emily walked away with an autographed pillow and a hug from her idol.
You can catch "Jimmy Kimmel Live" weeknights on ABC7 at 11:35 p.m. right after ABC7 News at 11.