Stevie Nicks told fans during a Facebook Q&A that a second volume of '24 Karat Gold -- Songs From the Vault' may be in the works. The first one was released a month ago, and debuted at No. 7.

The album includes newly recorded versions of old songs that Nicks never got around to officially releasing over the years, some from her Fleetwood Mac days and some from her solo career. While the record includes plenty of unreleased songs beloved by fans, many others didn't show up.

When asked why the fan favorite 'Julia' wasn't on '24 Karat Gold,' Nicks said, "It was on the original list. It's kind of like why the songs that did make the record didn't make it back in '75. You have to start cutting songs. When I do '24 Karat Gold: Part 2 Songs From The Vault,' 'Julia' will definitely be on it."

Nicks is currently on the road with Fleetwood Mac, who are touring with Christine McVie for the first time in years. She said her busy schedule will keep her from returning as a judge on the TV show 'The Voice.' "It takes a lot of time, and there are so many things I want to do over the next 10 years," she said.

"If you work on one of those shows, you are invested in it, and they spend a lot of time – half a year – of solid work, and you really can't be taking off on tour. Most people can't give up that time, for anything."

She also noted during her chat that she most likely would never write a book detailing the messy relationships that fueled Fleetwood Mac over the years. "I will probably never write a tell-all book," she said. "All the people I would talk about are still alive, and probably wouldn't be happy about it, so I wouldn't do that to them. Some day, when we're all very old, I will write the story in a very kind, calm, fun and romantic way. But not for a long time."

In the meantime, Fleetwood Mac will continue their reunion tour through 2015 and complete work on the first album to include the classic lineup since 1987's 'Tango in the Night.'