Katy Perry and John Mayer's duet 'Who You Love,' which appears on his album 'Paradise Valley,' will be the singer-songwriter's next single. Since it's a single, it has to have its own accompanying ...

During that time, they collaborated on the song "Who You Love" from Mayer's Paradise Valley album in 2013, while Mayer played guitar on "It Takes Two" from Perry's Prism album that same year.