John Mayer and Katy Perry are making sweet music together.

The couple, who are now back together after splitting in March, have recorded a duet they wrote together, Who You Love, for Mayer's new album, Paradise Valley (due out Aug. 20.)

The lyrics provide some insight into their romance.

Mayer begins the song, singing: "My girl, she ain't the one that I saw coming / sometimes I don't know which way to go / and I tried to run before but I'm not running anymore / 'cause I fought against it hard enough to know / that you love who you love who you love / you can't make yourself stop dreaming of who you're dreaming of / if it's who you love, then it's who you love."

Perry responds with: "My boy he ain't the one that I saw coming / and some have said his heart's too hard to hold / and it takes a little time / but you should see him when he shines / 'cause you never want to let that feeling go / when you love who you love who you love."

At the end of the song, Perry giggles. She told SIRIUSXM's Morning Mash Up "that's just a love giggle," she said. "I was going for that, I think I was just so happy ... You’re catching the real moment there."

Listen to John Mayer and Katy Perry sing Who You Love:

What do you think of the duet? Tell us in the comments.

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Katy Perry, John Mayer