Kathy Sledge lead vocalist of Sister Sledge is an American musical group from Philadelphia, Pennsylvania, formed in 1971 and consisting of four sisters: Kim Sledge, Debbie Sledge, Joni Sledge and Kathy. The group attained pop success in 1979 with their album “We Are Family”. The album would become the group's bestselling. Singles included "He's the Greatest Dancer" (#9 US, #1 R&B) 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.
In 2011 the Kathy and her sisters appeared on Oprah Winfrey's "Women Who Rock" episode, highlighting their "We are Family" as one of the most requested songs of all time.