Sister Sledge is an American ... Kim and Kathy Sledge. The siblings achieved international success at the height of the disco era. The year 1979 saw the release of their breakthrough album We Are ...

and "We Are Family" (#2 US, #1 R&B), the latter song becoming their biggest hit. The album was written and produced by Nile Rodgers and Bernard Edwards of the group Chic. Sister Sledge's next ...