Slash has opened up about how he got AC/DC vocalist Brian Johnson to feature on his upcoming album.The Guns N’ Roses guitarist will drop his upcoming blues record, ‘Orgy Of The Damned’, on May 17th via Gibson Records, and has shared its lead single, a cover of Howlin’ Wolf’s ‘Killing Floor’. The song features Johnson and Aerosmith‘s Steven Tyler on harmonica duties.Speaking to Audacy’s Check In, Slash said: “I had the song and I was trying to think who would be great to do it. And Brian came to mind.