AC/DC vocalist Brian Johnson joined Foo Fighters live on stage during the filming of Global Citizen's Vax Live: The Concert To Reunite The World show for a cover of "Back In Black". The show took place at the SoFi Stadium in Inglewood, CA and will air on May 8 on ABC, ABC News Live, CBS, Fox, YouTube, iHeartMedia as part of Global Citizen's "Vax Live: The Concert To Reunite The World"
As for the cover, what did you expect? Foo Fighters are one hell of a backing band and Johnson knows "Back In Black" pretty well, considering he's performed it thousands of times over the years.