Though Paula Cole may be best known for pop-rock hits “I Don’t Want to Wait” and “Where Have All the Cowboys Gone?” she started her career as a jazz singer. Now, she’s coming full circle to embrace her musical roots in jazz and folk: Her latest album, 2017’s Ballads, includes covers of genre classics such as “God Bless the Child” and “What a Little Moonlight Can Do.” Joining Cole on the bill at a Stowe concert is two-time Grammy Award-nominated vocalist Jane Monheit, whose silky phrasing and romantic interpretations shine through her 2016 tribute album The Songbook Sessions: Ella Fitzgerald.