Chris Stapleton left fans in tears on Monday when he was joined by his wife Morgane as they gave a heartbreaking tribute to the 60 people killed and more than 400 injured after a gunman opened fire in Las Vegas in 2017.MORE: 2022 ACM Awards winners - live updates The singer performed his song Watch You Burn, which was written following the tragic events of October 2017 and which remains the worst mass shooting in U.S. history, at the 2022 ACM Awards alongside a 16-person choir, who joined him on stage surprising fans.