Blake Shelton Shares Sweet Backstage Shot from Gwen Stefani's Boston Concert: 'This Is An Epic Thing to See'

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Blake Shelton played the role of adoring boyfriend on Tuesday, turning up to support girlfriend Gwen Stefani before her This Is What the Truth Feels Like Tour kicked off in Boston.

The country crooner appeared on the "Make Me Like You" singer's Snapchat, giving her a look she took to mean, "Snapchat is stupid," while also taking a few pics and videos of his own.

WATCH: Blake Shelton and Gwen Stefani's New Profile Pics Are the Most Adorable Throwbacks of Each Other

Shelton, 40, couldn't have been more excited to watch his lady love live in concert. On Monday, he raved about her amazing show on Twitter, a night before it kicked off.

"Hey Boston.. I'm so happy for y'all!! I'm here watching @gwenstefani rehearsal right now. Prepare yourselves for greatness!!!" the country star tweeted.

WATCH: 8 Gwen Stefani Songs We Totally Think Are About Blake Shelton

On Tuesday, Shelton shared a pic of Stefani, 46, singing her heart out on stage during her show Xfinity Center. "Wow... I am a terrible photographer but this is an epic thing to see!!!" he captioned the snapshot.

WATCH: Blake Shelton Says He's the Happiest He's Ever Been With Gwen Stefani

Stefani's This Is What the Truth Feels Like Tour runs through October 16, when she'll close out with a two-night engagement at The Forum in Inglewood, California.

On Sunday, Stefani rocked the third day of the MLB All-Star Weekend concert series in San Diego, and marveled at how amazing it felt to be touring again for the first time in seven years. Check out the video below to hear more from the pop superstar.

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