Katy Perry Admits She'll Write Songs About Her Breakup With John Mayer

Katy Perry and John Mayer

Someone's stealing Taylor Swift's thunder.

In a recent interview with Cosmopolitan, Katy Perry admitted that we'll most likely be hearing about her rocky relationship with John Mayer on her upcoming music.

"There's no bad blood," she told the magazine. "But I'm sure there will be inspired songs."

The 29-year-old is on the cover of the July issue of the magazine and has just been named Cosmopolitan's first-ever global cover star.

That means there's not only one, but 62 different cover shots of the green-haired pop star.

"NBD just COVERing all 62 international editions of @Cosmopolitan's July issue," the songstress wrote on her Instagram.

PHOTOS: Katy Perry's fun fashion

So Perry's revelation begs the question: what does Mayer think of all this?

"I have super strength for gang-ups," he told TMZ on Tuesday. "I'm fine. That's what you're supposed to do, man. You're supposed to write songs. You're just not supposed to tell everybody you're doing it."

And when asked if he wants his exes' songs about him to succeed, he replied, "I actually want everybody's song to go No. 1. I purposely stopped writing hits to give other people a chance to have No. 1 songs. I just stand to the side."

PHOTOS: Katy Perry's Prismatic World Tour costumes