The Isley Brothers have redefined the term “family affair” over the course of their 57-year-career, with lineups that included different combinations of six brothers and one brother-in-law. The group first found success crossing from the gospel world into secular music, scoring hits with “Shout” and “Twist and Shout,” later famously covered by the Beatles. The 1969 single "It's Your Thing" was one of the earliest hits of the then-fledgling funk genre. —Jeff Royer
(Photo: Chris Ware, Hulton Archive, Getty Images)
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