As Stereogum points out, the Fleetwood Mac singer's latest is actually an updated version of an old Nicks and Lindsey Buckingham demo called "Knockin' On Doors." On the introspective track, she sings about getting older and what her fate may be: "I know that things gotta change/But how to change them, isn't clear."

24 Karat Gold - Songs from the Vault will be out Oct. 27. But Nicks has a surprise in store for vinyl fans, who will be able to grab a copy of a limited-edition double LP on Sept. 29.

"Each song is a lifetime. Each song has a soul. Each song has a purpose. Each song is a love story," Nicks said in a statement. "They represent my life behind the scenes, the secrets, the broken hearts, the broken hearted and the survivors. These songs are the memories - the 24 karat gold rings in the blue box. These songs are for you."