08/13/2013 08:27 am ET

John Mayer & Katy Perry's 'Who You Love' Hits Web (AUDIO)

John Mayer's new album "Paradise Valley," which is streaming now on iTunes before the disc's Aug. 20 release, features at least one song of note: "Who You Love," Mayer's twangy ballad with his girlfriend, Katy Perry.

"My boy ain't the one that I saw coming," Perry sings on the track. "Some have said his heart's to hard to hold. It takes a little time, but you should see him when he shines. Because you'll never want to let the feeling go."

That's some real-talk from Perry, who told the U.K. edition of Elle that Mayer "pulled away" despite her best efforts. Not that it matters, as Perry had previously said in an interview Vogue that she's "madly in love with" Mayer.

Listen to "Who You Love" above.

Katy Perry