Crue had previously signed a legally-binding document making it all-but impossible for them to reunite after their farewell world tour. Sixx tells Classic Rock: "We've got a docu-series about the last night, with lots of interviews. It's kind of like the last night on Earth, of being together.

"It's interesting, because we talk about each other in a way that's endearing - but not. We say where we're really at. We talk about the drama and the pain of being in a band that has ceased to run on creativity, just on pure, mechanical motions."

He says the band refused to write new material for the movie version of infamous biography The Dirt, adding: "If it comes down to, 'Well, you have a movie, you need to write music,' I'm like, 'Sorry, but that's cheap. We don't want to go, 'We have to write a song for marketing.'