Ben Folds, Jewel and Shawn Stockman Ben Folds, Jewel and Shawn Stockman

It's been almost two years since The Sing-Off last serenaded viewers, but the a cappella competition is back and hotter than ever!

In this exclusive sneak peek from Season 4 (Dec. 9, 9/8c), one of the groups blows the judges — including new addition Jewel — away with a cover of Johnny Cash's classic "Ring of Fire."

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"Y'all blow the roof off of this," judge Shawn Stockman tells one of the groups. To get scoop on the new season and see which holiday favorite will get the a cappella treatment, check out the exclusive sneak peek below:

The Sing-Off premieres on Monday, Dec. 9 at 9/8c on NBC. Are you excited for the show's return?