Ladies and gentlemen, we'd like to introduce you to the biggest Katy Perry fan EVER.
And we don't mean "biggest" in stature - on the contrary, Katy's biggest fan is this adorable little baby.
Seen having a bit of a strop in her car seat, the fan then goes absolutely wild when Katy's hit Dark Horse comes on the radio.
It's seriously cute.
Don't believe us? Watch the vid here:
