A new documentary will reveal it.

And it includes, not surprisingly, "costume parties, joyous dinner feasts, tap dancing, and fantasy creations".

It also includes Stevie's writing and recording process behind her 2011 album, "In Your Dreams" high above (where else?) the Hollywood hills in a "magical mansion".

"In Your Dreams - Stevie Nicks" will premiere October 7 at the Hamptons International Film Festival.