Best week ever for Katy Kats? After the lead single to Katy Perry's Prism album "Roar" leaked a few days early (giving us this awesome emoji lyric video), fans now have another new joint on their hands!

Yep, the John Mayer/Katy Perry duet "Who You Love" has surfaced, lifted off his upcoming sixth album Paradise Valley. Listen above.

You can also stream John Mayer's Paradise Valley on iTunes now, a week ahead of its August 20 release date.