Sister Sledge - We Are Family [1979] 🎶🎵 Food for Thought 💭 Sister Sledge is an American musical vocal group from Philadelphia, Pennsylvania. Formed in 1971, the group consisted of sisters Debbie, Joni, Kim, and Kathy Sledge. The siblings achieved international success at the height of the disco era. In 1979, they released their breakthrough album We Are Family, which peaked at number three on the Billboard 200 and included the 1979 US top-10 singles "We Are Family" and "He's the Greatest Danc