She’s the subject of a new documentary, has just announced her farewell tour, and is about to play Glastonbury. The singer and songwriter discusses Trump, resilience and why she hated being pitted against Madonna

Once you’ve had a feature-length documentary made about you, it’s surely time to accept you’ve reached legendary status? Cyndi Lauper laughs. “My dogs don’t think so,” she says, to the sound of barking. Then, to her dogs: “You gotta stop, guys!”

Lauper is the subject of Let the Canary Sing, a new film by Alison Ellwood. It follows Lauper from her difficult childhood with an abusive stepfather, through the New York music scene and early bands, to the release of feminist anthem Girls Just Want to Have Fun, and beyond. There are clashes with music execs who don’t understand Lauper’s art school sensibility and want her to compete with Madonna, and she survives a career downturn. More recently, Lauper has become a campaigner, and the writer of award-winning musicals.