Ben Folds, Sara Bareilles and Shawn Stockman Ben Folds, Sara Bareilles and Shawn Stockman

[Warning: This story reveals the winner of Season 3 of The Sing-Off. Read at your own risk.]

After 16 groups and 11 weeks of competition, it came down to the final three groups on the Season 3 finale of The Sing-Off Monday.

Urban Method, from Denver, CO, was the first group eliminated after they sang Gym Class Heroes' "Stereo Hearts" and performed with judge Sara Bareilles on her new single "Gonna Get Over You."

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Dartmouth Aires, the 16-person club from Dartmouth College, was named runner-up. They chose "Paradise By The Dashboard Light" by Meat Loaf as their final performance and collaborated with judge Ben Folds on his classic chart-topper "Not the Same." The Aires would have been the first college group to win the singing competition.

Finally, host Nick Lachey named Pentatonix the winning group of The Sing-Off's third season. The five-person ensemble from Arlington, Texas walks away with a Sony recording contract and $200,000.

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Before their victory lap, the group sang a rendition of David Guetta's "Without You" and took on 98 Degrees' "Give Me Just One Night" with former 98 Degrees lead singer Lachey.

"I don't even know what to say, I can't believe it," member Scott Hoying said. "I'm just so humbled to share the stage with my best friends. They're my family. These were 16 amazing groups — I can't believe this has happened."

Do you think the right act won The Sing-Off?