'America's Got Talent: The Champions' 2020 season bid farewell to both Julianne Hough and Gabrielle Union and welcomed Heidi Klum and new judge Alesha Dixon. Judges Gabrielle Union and Julianne Hough are vacating their chairs on NBC’s unscripted series “America’s Got Talent,” Variety can report exclusively. It was revealed on November 22 that Julianne Hough and Gabrielle Union would not be returning for season 15 of Americas Got Talent. They judged alongside Simon Cowell and Howie Mandel in … Union, an NAACP Image … The news … It's one-and-done for America's Got Talent 2019 judges Julianne Hough and Gabrielle Union.