As Paramore refined their sound more on their recent self-titled LP, there's one track that clearly shows just how much the band has matured: 'Hate to See Your Heart Break.'

Frontwoman Hayley Williams has taken that song one step further by re-recording the track as a duet with former Civil Wars member and longtime friend Joy Williams. Keeping the melody more or less the same, the blending of the two voices adds whole new dynamic to the already emotional song.

“I think down deep I had been dying to write a song like this for a long time. What I love about 'Heartbreak' in particular is that both vocal melodies are strong enough to be leads but they sort of act as harmonies to each other," Hayley told NPR, which premiered the revamped track yesterday (Nov. 24).

And when asked about bringing in Williams to the musical equation, Hayley explained that she wanted to pick someone who wasn't only a great vocalist but also someone she's good friends with, which is what the song is really about.

“I love that I got to sing this with someone who I have shared my pains and my stories with for quite some time," she said. "Someone whom I know well and who I've sat and listened to as they share their own pains. It was never meant as romantic song between lovers but always a song to a friend. Now it's even more special. I think of it as an ode to sisterhood. Close friendship between women who share their stories with each other and who lift each other up and understand one another."

Director Chuck David Willis kept the video simple and straightforward by stripping away the color and focusing on what the two singers are emoting in the studio. By taking the no-frills approach, it becomes a nice visual compliment and forces viewers to focus on the lyrics and emotion rather than what's laid out on the screen.

The duet is one of the new tracks on the band's recently released 'Paramore: Self-Titled Deluxe' and is only available on the digital version of the album.