They're coupling up in the sheets and in the music studio!

Blake Shelton opened up about his duet with girlfriend Gwen Stefani, "Go Ahead and Break My Heart," which will be featured on the country boy's upcoming album If I'm Honest.

At a Voice event benefitting Children's Hospital Los Angeles on Thursday, the crooner told People, "We were at a point where it's like, 'Do we want to go there? What will people think?' And then we finally just got to the point where it's like, 'You know what? I don't give a s---."

"I love this song! This song's important to us and the fact that we wrote it together is so important to both of us," added Shelton.

The "Austin" singer and the No Doubt singer co-wrote the song in October.

Shelton also admitted he had some insecurities about working with the famed pop star, explaining, "I'm insecure about my writing and who I write with and I don't know – I'm just weird about it sometimes."

The superstar said the experience working with Stefani was a great one. "I think Gwen has a smaller circle too when it comes to writing, and the fact that we went there that early as we were getting to know each other, it's just remarkable," said Shelton.

Despite their vastly different genres, Shelton said their love of similar tunes helped them work together well. "As different as we are musically, we're a fan of the same type of songs. We have these playlists that we send each other that are stuff that we loved growing up and they're so similar, so I think it made it easy for us to collaborate," said Shelton.

On Tuesday, Stefani posted a snap of the album on Twitter with the caption, "Look what I found lying round the house! #ispymyname #goaheadandbreakmyheart @blakeshelton #eeeekkkk! #crazy!"

Looks like both of these singers love gushing about their new diddy!