Jenna Mammina brings a jazz-steeped sensibility to a set list that ranges unpredictably from Billy Strayhorn and Frank Loesser to Elvis Costello, James Taylor, and Steely Dan. She doesn’t just cover songs, observed one fan, she reupholsters them. At home in clubs (Yoshi’s, Town Hall New York) and jazz festivals (Monterey, New Orleans, Aspen), the crossover talent comes to Sonoma’s Sebastiani Theatre for a 7pm show on April 8. $32. Sebastianitheatre.org.