Entertainment Music Country Blake Shelton Opens Up About the 'Serious Insecurities' That Inspired His Duet with Gwen Stefani as Couple Shares Sweet Selfie "We both had trust issues. We were getting over it, but we wrote this song about it and it's perfect," he tells PEOPLE exclusively By Melody Chiu Melody Chiu Instagram Twitter Melody Chiu is a Senior Editor for PEOPLE. She has been with the brand since 2009, editing, writing and reporting across all entertainment verticals. She oversees PEOPLE's music and events coverage and has written cover stories on Taylor Swift, Selena Gomez, Melissa McCarthy, Blake Shelton and Sandra Oh. The Los Angeles native graduated from the University of Southern California and has appeared on Extra!, The Talk, Access Hollywood and Good Morning America. People Editorial Guidelines Published on May 9, 2016 06:15 PM Share Tweet Pin Email Photo: Source: Gwen Stefani/Instagram Weeks after Blake Shelton and Gwen Stefani finally confirmed they’ll be releasing a duet together on the country star’s upcoming album, fans of the couple will get to hear the song (now available on iTunes) when they perform it together Monday night on The Voice. “We’re a little bit nervous about it, but nervous in a way that we can’t wait and nervous in a way that we hope people think it’s as good as we think it is,” Shelton tells PEOPLE exclusively about debuting “Go Ahead and Break My Heart.” “It’s like people getting a look at something personal for the first time.” Ahead of Monday’s show, Stefani shared a selfie of Shelton kissing her forehead as the pair posed beside a tree carved with “B+G.” Shelton and Stefani – who began dating last fall – co-wrote the song together “about some serious insecurities that we had when we first started down this road with each other,” he says. “We both had trust issues. We were getting over it, but we wrote this song about it, and it’s perfect.” What makes the duet extra special is “the honest way it came about,” adds Shelton, whose new album If I’m Honest is out May 20. “There’s not a third ghost writer, there’s not five writers on it. It’s just she and I sat down and wrote this song and I couldn’t be happier about [it].” Blake and Gwen: Inside Their Love Story Both stars went through tough divorces last year (Shelton and Miranda Lambert divorced in July and Stefani and Gavin Rossdale announced their split several weeks later) and struck up a close friendship before their relationship turned romantic. “It was a really super unexpected gift to find a friend, somebody who happened to be going through the exact same thing as me, literally mirroring my experience,” Stefani said earlier this year. “I don’t think it’s an accident that that happened. It saved me.” The Voice airs Mondays and Tuesdays at 8 p.m. on NBC.