While most bands undergo a number of changes over the course of their career, few groups experienced such radical stylistic changes as Fleetwood Mac. Initially conceived as a hard-edged British blues combo in the late '60s, the band gradually evolved into a polished pop/rock act over the course of a decade. Throughout all of their incarnations, the only consistent members of Fleetwood Mac were drummer Mick Fleetwood and bassist John McVie -- the rhythm section who provided the band with its name. Ironically, they had the least influence over the musical direction of the band. Originally, guitarists Peter Green and Jeremy Spencer provided the band with its gutsy, neo-psychedelic blues-rock sound, but as both guitarists descended into mental illness, the group began moving toward pop/rock with the songwriting of pianist Christine McVie. By the mid-'70s, Fleetwood Mac had relocated to California, where they added the soft-rock duo of Lindsey Buckingham and Stevie Nicks to their lineup. Obsessed with the meticulously arranged pop of the Beach Boys and the Beatles, Buckingham helped the band become one of the most popular groups of the late '70s. Combining soft rock with the confessional introspection of singer/songwriters, Fleetwood Mac created a slick but emotional sound that helped 1977's Rumours become one of the biggest-selling albums of all time. The band's retained their popularity through the early '80s, when Buckingham, Nicks, and Christine McVie all began pursuing solo careers. The band reunited for one album, 1987's Tango in the Night, before splintering in the late '80s. Buckingham left the group initially, but the band decided to soldier on, releasing one other album before Nicks and McVie left the band in the early '90s, hastening the group's commercial decline.

Early in 1975, Fleetwood and McVie were auditioning engineers for the band's new album when they heard Buckingham-Nicks, an album recorded by the soft-rock duo Lindsey Buckingham and Stevie Nicks. The duo was asked to join the group and their addition revived the band's musical and commercial fortunes. Not only did the pair write songs, but they brought distinctive talents the band had been lacking. Buckingham was skilled pop craftsman, capable of arranging a commercial song while keeping it musically adventurous. Nicks had a husky voice and a sexy, hippie gypsy stage persona which gave the band a charismatic frontwoman. The new lineup of Fleetwood Mac released their eponymous debut in 1975 and it slowly became a huge hit, reaching number one in 1976 on the strength of the singles "Over My Head," "Rhiannon," and "Say You Love Me." The album would eventually sell over five million copies in the US alone.

Buckingham decided to leave Fleetwood Mac after completing Tango in the Night, and the group replaced him with guitarists Billy Burnette and Rick Vito. The new lineup of the band recorded their first album, Behind the Mask, in 1990. It became the band's first album since 1975 to not go gold. Following its supporting tour, Nicks and Christine McVie announced they would continue to record with the group, but not tour. Vito left the band in 1991, and the group released the box set 25 Years -- The Chain the following year. The classic Fleetwood Mac lineup of Fleetwood, the McVies, Buckingham and Nicks reunited to play President Bill Clinton's inauguration in early 1993, but the concert did not lead to a full-fledged reunion. Later that year, Nicks left the band and was replaced by Bekka Bramlett and Dave Mason; Christine McVie left the group shortly afterward. The new lineup of Fleetwood Mac began touring in 1994, releasing Time the following year to little attention. While the new version of Fleetwood Mac wasn't commercially successful, neither were the solo careers of Buckingham, Nicks and McVie, prompting speculation of a full-fledged reunion in 1997. The live album Shrine 69 was released in 1999. Say You Will, the first Fleetwood Mac studio album in fifteen years, appeared in April 2003. It also marked the group's first set without founding member Christine McVie since 1997's live effort, The Dance.