You'd think no one would know No Doubt frontwoman Gwen Stefani better than Gwen herself, right?
Wrong!
Last night on Jimmy Kimmel Live, he had a Gwen superfan on to test her knowledge on Gwen...against Gwen herself!
The results are pretty great with the fan winning!
Side note: I'm a pretty big Gwen fan myself...and have the same license plate as the super fan that won! Too funny!
WATCH: