Someone was flipping through an Archie comic book when they came across a character named Katy Keene.
And basically realized that everything Katy Perry has done heretofore has been inspired by her namesake comic character.
It's not THAT uncommon for pinup characters to have blue hair, though, right?
And it's probably just a coincidence that they both like to wear their hair in loose pin curls while lounging on fluffy pillows...
Though, Katy Perry prefers pillows of pink clouds to Katy Keene's heart-shaped one.