“Back In Black” is the title track off AC/DC’s first album with Brian Johnson, and became its third single. The song is a tribute to deceased frontman Bon Scott. When Brian Johnson was told to write a song, the members said, “It can’t be morbid – it has to be for Bon and it has to be a celebration.” And so they wrote it from Bon’s perpective. The song has since become a mainstay of their concerts, and the riff is one of the most iconic in rock music – for instance, it was the first song Kurt Cobain learned to play, at the age of 14.