Katy Perry and John Mayer music power couple

Move over Johnny Cash and June Carter Cash, there's a new iconic music couple brewing: John Mayer and Katy Perry.

Perry released her new single Roar, on Monday, as John Mayer professed his love for her with his new tune, Who You Love on which she also sings. The album is set to go out on Aug. 20.

"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/Cuz 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 adds:

"My boy, he ain't the one that I saw coming/And some have said his heart's too hard to hold," she croons. "And he takes a little time but you should see him when he shines/Cuz you never want to let the feeling go."

The couple started their romance in the summer of 2012, just six months after ex-husband Russell Brand filed for divorce. They broke up two times before the couple have reunited and proclaimed their love in this song.