By Brandy McDonnellWatch the Detroit Youth Choir perform a spirited remix of "The Champion," Checotah native Carrie Underwood's anthemic hit with rapper Ludacris, on Tuesday night's "America's Got Talent" quarterfinals on NBC.The choir, which earned the Golden Buzzer from “AGT” host Terry Crews earlier this season, opened Tuesday night's show.Read more on NewsOK.com