The Next AC/DC Vocalist?

Brian Johnson has made statements that lead us to believe that he may be retiring following the conclusion of the "Black Ice World Tour". Who will be the "Next AC/DC Vocalist?" The lead vocal track (Who Made Who) on this video was recorded in September, 2009 at Zolis Audio in Toronto. Don Coleman set the levels on the microphone with engineer Jim Zolis and then proceeded to sing the song once. The "Lead Vocal" is a "One Take", Live Off The Floor", "NO EDIT" rendition of the song, accompanied by musicians from around the world who have never met each other.