Fleetwood Mac are a British-American rock band formed in 1967 in London.

It's easy to be ridiculed for this one , but the fact remains, Fleetwood Mac started the 70s as a blues rock band, and a VERY good one at that .their early output with Peter Green is the reason why contemporary bands like the Black Keys exist, and by the mid point of the decade they had transformed themselves into to one of the greatest pop/rock bands of all time . Starting in 1975, when Lindsey Buckingham and Stevie Nicks were asked to join a revamped lineup, the group began crafting songs that were ripe with lush vocal harmonies, phenomenal guitar work by Buckingham, and massive hooks.