Why did Katy Perry break up with John Mayer? Katy Perry and John Mayer Tue-04-Mar-14 21:03 Share this By Steph Monks Katy Perry broke up with John Mayer because he was falling into old patterns of being a crap boyfriend. Last time they broke up and she took him back he promised he would make more of an effort and to put her first. But he has fallen into his old ways of turning his phone off and disappears all day and night so Katy doesn’t know where he is. He says it’s because he needs alone time, but she doesn’t want to have to put up with his shenanigans. You May Also Like Jay-Jay murders Katy Perry's 'Birthday' in Headphone Karaoke Jay-Jay, Mike & Dom's Rude Awakening - Zara gets woken up by the Auckland Brass Band playing Katy Perry! Edge listener Adrian faces his fear of cotton balls (yeeeep) to win his daughter Katy Perry tix! Become a fan of The Edge on Facebook and on Twitter .