Get Hep to Love (1942)

Budding concert artist Doris Stanley (Gloria Jean) leaves home to escape her Aunt Addie (Nana Bryant), a slave-driving, money-grubber, who hires a private detective to find her. Meanwhile, she gets "adopted" and sheltered by Ann (Jane Frazee) and Steven Winters (Robert Paige), a childless married coupled, and goes to a high school filled with jivin', jumpin' jitterbuggers.