John Mayer is a huge fan of girlfriend Katy Perry's 'Roar'

wochit entertainment
August 15, 2013 AT 4:43 AM
To no one's surprise, John Mayer recently told Billboard that he's a fan of "Roar," the new single from girlfriend Katy Perry. In fact, Mayer was a fan of the song before it reached the masses, and probably well before it leaked last weekend. "I remember hearing it for the first time, going like, 'Wow.