Listen, Darling (1938)

"See it with a song in your heart!"

To stop Pinkie's widowed, struggling mother Dottie from marrying a well-off older man they know she doesn't love, teenager Pinkie and her best friend Buzz kidnap her in the family travel trailer to live a carefree life on the open road. They then get the idea to find Dottie a financially secure husband whom both she and Pinkie would like.