Young teams with Norway's Astrid S

"I've grown up with country music," Astrid said. "It's a genre I admire very much, and it's been a big influence and inspiration throughout the years in my songwriting. I'm so happy Brett wanted to do this song with me. Hope you'll love it as much as I do."

Opening with a simple acoustic guitar and building to an anthemic chorus, "I Do" pairs Astrid and Young's contrasting vocals. The track is a confession of remaining feelings for a former lover, which the Norwegian singer wrote solo of a personal experience.

Young said, "I was so honored to be asked to collaborate on this track with Astrid. When I first heard 'I Do,' I instantly connected to the lyrics and storytelling, so jumping onboard and digging into something a little bit different was a no-brainer for me. I can't wait for the fans to hear this one."

Astrid S has released the EPs "Trust Issues" and "Stripped Down," touring in the U.S. and Europe with Years & Years and Zara Larsson. Astrid plans to release her debut CD this year.