Gwen Stefani, Blake Shelton

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What a difference a year makes.

One day before marking 12 months since Gwen Stefani and Gavin Rossdale filed for divorce, the "Make Me Like You" singer took to the stage in Detroit where a special guest just so happened to show up.

In between her set at the DTE Energy Music Theatre, the lead singer of No Doubt brought Blake Shelton out on stage to perform their duet titled "Go Ahead and Break My Heart."

According to concertgoers, the pair ended the song with a hug on what Gwen called "a really special night."

Perhaps Tuesday night's performance doesn't come as the biggest surprise to fans of the couple. Earlier in the day, Gwen was active on Snapchat where she documented rehearsals with her boyfriend close by.

In between sound check, Blake also had to point out that Gwen "has had three cups of French Onion soup" and loves her share of Trident gum. Wait, is Gwen just like us?!

Backstage habits aside, the duo's collaboration is quite special to each performer who have worked together as coaches on The Voice. In fact, after performing their track on the NBC reality show, both parties spoke out about how much the song meant to them.

"This is one of my favorite songs I've ever written or recorded," Blake said when the performance was announced. "The song couldn't possibly be more honest. I'm honored to have written and to perform this song with the great Gwen Stefani. Respect."

"Yeah, it feels like, 'Wow, that happened.' I can't believe I wrote a song with that guy." Gwen also shared with E! News at 102.7 KIISFM's Wango Tango. "And then we got a chance to sing it together on The Voice. Like...and everyone got to see that. It was a miracle. It was incredible."

"Go Ahead and Break My Heart" is featured on Blake's new album If I'm Honest in stores now. Find out if Gwen is visiting your town this summer by visiting her website.

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