Cam made a very special appearance on the season finale of The Voice on Tuesday night (Dec. 13), joining Season 11 finalist Josh Gallagher for a duet on her hit song, "Burning House."

Gallagher made his way into the finals after a stellar run on this season on Team Adam. The Johnstown, Pa., born singer now makes his home in Nashville, and he's represented country music for Adam Levine this year, giving Levine a real shot at finally winning with a country singer.

He picked Cam as his duet partner for the final show, and they blended their voices on her Platinum-certified Grammy, ACM and CMA Awards-nominated hit on Tuesday evening like they'd been singing together forever. Cam almost always wears yellow, but on Tuesday night she wore a black and sparkly dress that fit her like a second skin, while Gallagher was clad in his usual ball cap and a suit.

The performance followed a pivotal moment for Gallagher on Monday night (Dec. 12), when he debuted an original song on The Voice titled "Pick Any Small Town." It's a song that even rival coach Blake Shelton admitted that he could relate to, and Gallagher followed it up with a stellar rendition Santana‘s “Smooth,” with the country singer delivering most of the lead vocal as Levine played lead guitar and traded off on vocals. Gallagher also performed John Mellencamp‘s “Jack & Diane" on Monday night, leading into the finals that will decide who takes home the crown for The Voice Season 11.

Gallagher also invited two former contestants to join him for a high-energy performance of Jason Aldean's "My Kinda Party" on Tuesday night.

Gallagher is facing off against Billy Gilman, Sundance Head and We McDonald to see who will win Season 11 of The Voice.

Watch Josh Gallagher's "Pick Any Small Town" Music Video

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