Katy Perry Posted This On Twitter Yesterday In case you were on the fence about whether Katy Perry and John Mayer are actually together, Perry posted this picture of Mayer in a Santa outfit on Twitter yesterday. Because *puts on sunglasses* he came down her chimney. Related Posts: Katy Perry Is Mad “Roar” Wasn’t Nominated For A VMA Nope Robert Pattinson Really Wants To Bang Katy Perry Yawn Katy Perry Is Single. Again. Tags: john mayer, katy perry Miley Cyrus Doll Rob Kardashian Got Botox. He’s 25.