Joan Jett and the Blackhearts will release Unvarnished, a new studio album, on October 1st. 　　Jett’s first album since 2006′s Sinner, Unvarnished will be a 10-track affair highlighted by guest spots from Dave Grohl and Laura Jane Grace (of Against Me!). 　　As she told Rolling Stone, the new record is the ‘most autobiographical work’ she’s done, including themes such as Hurricane Katrina and the death of her parents.