Lindsey Buckingham and Stevie Nicks put together a self titled album that eventually became their "audition".  Mick Fleetwood was in LA shopping for a studio back in 1974.  He went to Keith Olsen's place where the Buckingham/Nicks album was used as a demo to showcase Keith's work.  Mick wanted to meet "those people" and from then on they became Flettwood Macers.  Here is a cut from that album called Frozen Love