WASHINGTON, DC - SEPTEMBER 17: Axl Rose of Guns N' Roses performs with AC/DC during the Rock or Bust Tour - Washington, DC at the Verizon Center on September 17, 2016 in Washington, DC. (Photo by Paul Morigi/Getty Images for BT PR)

WASHINGTON, DC - SEPTEMBER 17:  Axl Rose of Guns N' Roses performs with AC/DC during the Rock or Bust Tour - Washington, DC at the Verizon Center on September 17, 2016 in Washington, DC.  (Photo by Paul Morigi/Getty Images for BT PR)