Encore: The Wanda Jackson Story is an independently produced documentary about Wanda Jackson — teen country prodigy, “Queen of Rockabilly,” gospel singer, Hall of Famer, and one of the first women to kick down the doors of rock & roll’s boys’ club. From a tiny town in Maud, Oklahoma, to the Capitol Records tower in Hollywood, from touring with Elvis Presley in the mid-1950s to recording with Jack White and Joan Jett decades later, this film traces the full arc of Wanda’s life: the hits, the hard