Power Up (sometimes shortened as PWR/UP and stylised as PWRϟUP such as on the front cover) is the seventeenth studio album by Australian rock band AC/DC, released on 13 November 2020. It is their sixteenth internationally released studio album and the seventeenth to be released in Australia. Power Up marks the return of vocalist Brian Johnson, drummer Phil Rudd and bassist Cliff Williams, all of whom left AC/DC before, during, or after the supporting tour for their previous album Rock or Bust (2014). This is also the band's first album since the death of co-founder and rhythm guitarist Malcolm Young in 2017 and it serves as a tribute to him, according to his brother Angus. Background Following the 2014 album Rock or Bust, the group embarked on a seventeen-month world tour. Prior to the tour, drummer Phil Rudd was charged with attempting to procure murder, threatening to kill, possession of methamphetamine, and possession of cannabis. For the tour, Rudd was replaced by Chris Slade who had also previously played with AC/DC on their 1990 album The Razors Edge, several years after Rudd first left the band. Mentions of Rudd were also scrubbed from the band's website as well. By 2016, l…