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Circa 1975, Singers Cassie Gaines (1948 - 1977), Leslie Hawkins and Jo Jo Billingsley of the American rock group, Lynyrd Skynyrd, 1970s. (Photo by Getty Images/Getty Images)

Circa 1975, Singers Cassie Gaines (1948 - 1977), Leslie Hawkins and Jo Jo Billingsley of the American rock group, Lynyrd Skynyrd, 1970s. (Photo by Getty Images/Getty Images)