Representing the only duo left on NBC's hit show 'The Voice,' the Swon Brothers covered 'Wagon Wheel' -- which recently became country star Darius Rucker's hit, originally made famous by Old Crow Medicine Show -- on Monday night (June 3). The gushing praise of the judges certainly showed that the Brothers' performance was spot-on, propelling Team Blake Shelton forward. 

The Oklahoma-born siblings started the song off with an energetic "C'mon!" and kept that vibe throughout the entire tune. They were spiffy with expertly coiffed hair and coordinated black and white outfits, and their voices were as perfectly in sync as their acoustic guitars.

The Swon Brothers' background singers added a little bit of sass, in their saloon-appropriate attire, and based on the grins on the brothers' faces, they were enjoying it as much as the audience.

The judges applauded them, and a particularly positive comment came from Shakira, who said, “I’m so into country music right now and I think it’s because of talented artists like you." While the 'Hips Don't Lie' hitmaker probably won't be donning cowboy boots anytime soon, her musical influences have been broadened due to great country music artists on the show.

Of course, Shelton was extremely pleased with their rendition of 'Wagon Wheel.' “There’s nobody else that sounds like you guys. And that’s a really good thing," he chimed in. "Hats off to you guys.”

There's a whole lot of tight competition for the top five spots, and the Swon Brothers will discover whether or not they made it into the semi-finals on Tuesday night (June 4) at 8PM ET on NBC.