VIDEO: Derek Hough Sneaks In to Light Balance's Epic Performance on AMERICA'S GOT TALENT

This season of "America's Got Talent" concluded last night at the Dolby Theatre in Hollywood with a star-studded live finale featuring performances by the 10 finalists along with Kelly Clarkson, Shania Twain, Derek Hough, James Arthur, Kevin Nealon, Jeff Dunham and season two winner Terry Fator. During the telecast, light up dance crew Light Balance was joined by a surprised guest, the amazing Derek Hough! Catch this incredible collaboration below!

At the end of the night, America crowned 12-year-old singing ventriloquist Darci Lynne Farmer from Oklahoma City, Okla., as the season 12 winner of the most-watched season in the 12-year history of summer's #1 show, NBC's AMERICA'S GOT TALENT.

Farmer received the most votes ever for a finale show in "AGT" history and won viewers over with her incredible performance of the Beatles' classic "With a Little Help From My Friends" alongside her puppets, Oscar and Petunia. She faced tough competition with the other Top 10 finalists, including singer Evie Clair, dance group Diavolo, singer Chase Goehring, singer Angelica Hale, singer Mandy Harvey, comedian PREACHER Lawson, dance group Light Balance, singer Kechi and animal act Sara and Hero. Last night's live telecast hit a three-year high in 18-49 and a six-year Tuesday high in total viewers.

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