Nick Jonas and Demi Lovato brought their Future Now Tour to Nashville, Tenn., Wednesday night (Sept. 7), and their visit to Bridgestone Arena also included some very special guests.

Jonas' former CMT Crossroads duet partner, Thomas Rhett, joined him on stage for a performance of Rhett's previous No. 1 hit "Die a Happy Man." The two singers traded verses on the track before singing the chorus together.

Suffice it to say, fans were overly excited for the chance to see the two superstars perform together.

Rhett and Jonas also sang "Chainsaw" together. While Jonas played piano on the song, Rhett stood beside him with his acoustic guitar as the two harmonized on the chorus.

Jonas later said the night was "one of my favorite shows" on the tour, and Rhett shared his appreciation to share the stage with him, as well. "Thanks for having me out in Nashville tonight @nickjonas it was a blast!" the country singer wrote as the caption of a photo of the two together.

The superstar collaborations weren't over for the night, though, as Demi Lovato also had a country surprise for the audience, bringing out duet partner Brad Paisley for their song "Without a Fight."

Paisley later accompanied Lovato and Jonas for Lovato's "Stone Cold." The country star also revealed that he was treated like a king backstage — his demand to only have brown M&Ms in his dressing room was successfully answered.

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