Sister Sledge is an American musical group from Philadelphia, Pennsylvania, formed in 1971 and consisted of four sisters: Debbie Sledge, Joni Sledge, Kim Sledge, and Kathy Sledge. They are granddaughters of the former opera singer Viola Williams. The group is best known for their hit songs We Are Family, Lost In Music, He's the Greatest Dancer, and Frankie.
Read more: Wikipedia