Fleetwood Mac: Sisters of the Moon (1980)

The studio track is 4:36 long, but when the band plays it live, "Sisters of the Moon" often tops 8 minutes. The song has a supernatural paranormal feel to it. Naturally, it was written by Stevie Nicks. The song is a favorite among her fans.

Studio:

http://www.youtube.com/watch?v=Onbwcek3qvM

Live:

http://www.youtube.com/watch?v=nbD4fj39pEk