Motor Sister are an LA-based supergroup formed by Anthrax guitarist Scott Ian, featuring Jim Wilson (vocals, guitar), Scott Ian (guitar), Joey Vera (bass), John Tempesta (drums) and Pearl Aday (vocals).
"For his fiftieth birthday, Anthrax guitarist Scott Ian wanted one present more than any other - the reunion of one of his favorite unsung heroes, Mother Superior - only he wanted to be a part of the lineup."