For the album, Slash recruited onetime GNR touring keyboardist Teddy Andreadis and bassist Johnny Griparic, who he played with in an ad hoc band called Slash’s Blues Ball during the late ’90s in Los Angeles. They added Michael Jerome on drums and started working on material with the idea of having fun at the top of the agenda.

There’s also Demi Lovato, the rock-loving pop star who gives a powerhouse performance of the Temptations’ “Papa Was a Rolling Stone.” “That was so left-field for everybody involved, because she’s from the pop world,