Can Jimmy Fallon Really Sing? Host Stuns Fans During Surprise Appearance at Jonas Brothers Concert

Jimmy Fallon showed he is more than just a late-night host again.

Jonas Brothers held its Yankee Stadium show in the Bronx, New York, on Sunday night as they kicked off their Five Albums. One Night. The World Tour. They also made the night special by tapping Fallon to make an unexpected appearance.

Jimmy Fallon Unleashes Singer Side at Jonas Brothers' Concert

Fallon left his hosting chair for a moment to show off his singing skills at the Jonas Brothers' weekend concert. The comedian-host, who also turned out to be a good singer, led the crowd as they sang The Killers' "Mr. Brightside."

After his performance, Fallon expressed his gratitude to the trio for allowing him to take on a guest spot at their show.

"Huge thanks to @jonasbrothers for giving me the surprise guest spot on 'The Tour' tour," he wrote. "And thank you to @yankeestadium for turning it into the world's biggest karaoke party. This is one of those nights I will never forget."

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Fallon also uploaded a snippet of his performance featuring the energetic crowd, as his boom box accompanied him on stage.

Aside from the host, Jon Bellion and Kirk Franklin joined Jonas Brothers on stage during the first nights of the tour, and the latter performed a rendition of his track, "Walls."

Fallon previously wowed "The Voice" viewers when he had his blind audition and performed Michael McDonald's "I Keep Forgettin' (Every Time You're Near)." Judges Kelly Clarkson, Niall Horan, and Chance The Rapper all looked shocked after pushing their buzzers and seeing the host in front of them.

Meanwhile, Blake Shelton - who knew it was Fallon all along - refused to turn around and lead Fallon pushed his button instead.

Jonas Brothers Say Current Tour is "Most Ambitious Show" Ever

Fallon became part of the Jonas Brothers' show, which the musicians dubbed the most ambitious one they have ever done.

In their interview with People, Joe quipped about how they decided to do their first show at one of their biggest venues. He added that they prepared and built a beautiful show for their fans to see, pledging to perform songs from five different albums.

"If you're an OG superfan or if you're more into the new stuff, I think you're going to be pleasantly surprised and have a great time," Joe added. "There's something for everybody."

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