We've been head over heels with celeb couple Gwen Stefani and Blake Shelton ever since we first heard about the two lovebirds getting together.

And we already knew that they drew musical inspiration from each other, so when we discovered they were working on a duet together, we expected it to be an emotional doozy. Turns out that yep, it was destined to be from the get-go, because Blake Shelton only started writing the song in the first place to "impress" Gwen. CUTENESS.

"When I originally started writing this song that we're performing tonight, I was only trying to impress Gwen," he told Entertainment Tonighton Monday before the performance.

The song was inspired by the heartbreak they were separately going through at the time, as Gwen had previously been dealing with her divorce from husband of 13 years Gavin Rossdale, while Blake had been going through his divorce with Miranda Lambert last spring. "I started this song and wrote about half of it and sent it to her and she wrote the other half of it. It was just kind of something for she and I to help us feel better about what we were going through," he told ET.

And if you think that's cute, you should see the live performance of the two of them singing the duet, "Go Ahead And Break My Heart," which was recorded in front of the studio audience on Monday an hour before The Voice kicked off.

They face each other the entire time as they sing, and they're practically the epitome of the heart-eye emoji.