Derek Hough Joins Light Balance for Dance Performance on 'AGT' Finale! (Video)

Derek Hough takes off his mask to reveal himself as a surprise member of Light Balance during a performance on the America’s Got Talent finale on Wednesday (September 20) at the Dolby Theatre in Hollywood. The 32-year-old dancer, who is a judge on World of Dance, wore one of the dance crew’s light-up costumes while