Over the weekend, Robert Plant was spotted at the Fox Inn in Stourton, England at his ex-wife, Maureen's 70th birthday party.
He was seen sitting in with rockabilly group, the Hayriders for a three-song set of Elvis Presley tunes.
Plant sang "One Night", "Little Sister" and "A Big Hunk O' Love" and wished Maureen a happy birthday, jokingly calling her an "old bugger".
Of course, the twenty-minute impromptu gig was captured in a video. You can watch it below.