The shootings, which also left 21 people injured, sparked debate over gun control laws in the US - and Manson reports that after the slaughter, live venues simply closed the door on him.

Speaking at Grey's annual music seminar in Cannes, France, Manson says: "With Columbine, it really shut down my career entirely, to the point where casinos refused to book my shows.

"It's almost unprecedented. Not only did I not do anything, they were not fans of mine. I sat and watched it live on TV and they said initially they were wearing Marilyn Manson make-up and t-shirts. You find out later that they weren't."