In the mid ‘70s, Stevie Nicks and Lindsey Buckingham took Fleetwood Mac from cult heroes to pop superstars. Nicks' throaty, hypnotic vocal style helped make the group's moody, mysterious songs the quintessential sound of ‘70s radio. The mystical feel of “The Chain” and “Sisters of the Moon” dovetails with Nicks' good-witch-of-rock ‘n' roll persona, adding extra depth to the band's allure.