Listen to Katy Perry on iHeartRadio

Katy Perry competed against a superfan of hers named Emily in a game of “Who Knows Katy?” on “Jimmy Kimmel Live.”

The premise was simple: Kimmel asked the singer and one of her biggest fans a series of personal and professional questions about Perry, and the one who answered the most correctly was the winner.

Before the game began, Emily said she had a “Katy Perry Wall” in her home that her boyfriend made her take down, prompting Perry to say, “At least you have a boyfriend.”

Among the questions asked were what are Perry’s parents’ names, which “American Idol” she wrote two songs for, how many Grammy nominations she has, and the names of her three perfumes.

And the winner was… ?

Check out the video below!