Emily Ann Roberts, Jordan Smith face off in The Voice finale

 With a recording contract on the line, Knoxville's Emily Ann Roberts and Harlan, Kentucky's Jordan Smith each gave three showstopping performances during The Voice Finale. And at least one coach is predicting a potential upset winner. But it will be up to viewers to decide who will be the winner of "The Voice."

Jordan Smith kicked things off Monday night with his rendition of "Climb Every Mountain." Like most of his performances, it left the judges nearly speechless. But each one applauded his humbleness. 

WATCH: Jordan Smith sings "Climb Every Mountain" 

Blake Shelton told Jordan that there's really nothing left for them to say anymore.

"You're always so consistent, but consistantly great. Not good, not okay, not got through the song, like great every time," Shelton said. 

WATCH: Jordan Smith, Emily Ann Roberts cover range of songs in finale

His coach, Adam Levine, said that people love something beyond Jordan's talent. They love his ability to be inspired, which inspires people. 

WATCH:Emily Ann Roberts sings Burning House

Knoxville's Emily Ann Roberts wrapped up the show with an incredible solo performance of "Burning House" by Cam. It led to a standing ovation from all four judges and had her coach predicting a potential upset. 

Blake Shelton told Emily Ann Roberts that if anyone in the compe
"What's amazing about this guy is my belief in Jordan is fine, but Jordan's belief in himself and the humble nature with which he projects that into the world is one of the most beautiful things I've ever seen," Levine said. 

HOW TO VOTE: Viewers will decide who is the Season 9 winnertition could pull an upset, it was the performance she just gave. 

Meanwhile, Shelton also said she could end up being the next Taylor Swift or Carrie Underwood.

All four Voice finalists also performed a duet with their coach and a Christmas song. 

Jordan sang his favorite Christmas song, "Mary Did You Know?" and Emily Ann sang "Blue Christmas."

For their duets, Jordan and Adam Levine took on the Beach Boys hit, "God Only Knows." While Emily Ann and Blake Shelton brought a whole lot of country with their performance of "Islands In the Stream."  

There are four different ways to vote for each contestant. You can vote up to 10 times each on The Voice app, NBC.com, and The Voice Facebook page. You can also purchase their finale songs on iTunes. Voting closes at noon on Tuesday. 

As Jordan Smith and Emily Ann Roberts performed out in Los Angeles, hundreds of people got together in their hometowns to cheer them on. Friends, family, and community members gathered in Knoxville and Harlan to watch Jordan and Emily's finale performances.