there's a current chevy commercial . . . where girls (in a car, of course) are cheerfully singing this song . . . and it is so upbeat that it instantly makes the viewer ask this question: "hey, what IS that song?"
the commercial has a dandy subplot/parallel narrative showing guys in a car also listening to this fleetwood mac song -- and the dudes are a little bit embarrassed that they are publicly enjoying such a "chick song"