Titled "Fresh Start", the upbeat song's theme is dealing with rock musicians' struggle when they reach a certain age. You can listen to it in the video above.
In an interview with Entertainment Weekly, Jett said, “Sometimes you need to say to yourself, ‘Am I still enjoying what I’m doing? I need to find the fire again'”. She believes that rock music has always been a "young person's game, writing about sex, love and partying".
As rock and rollers get older, what do they write about? I’m not sure there’s an answer, but we’re looking for it.
The documentary film "Bad Reputation" will hit cinemas and streaming services this 28th Sept.