The sibling vocal group behind the exemplary togetherness anthem "We Are Family" (1979), a chart-topping, platinum-certified, Grammy-nominated mainstream breakthrough, Sister Sledge reached their commercial peak during the disco era but had been recording since the early '70s, and have remained active in the following decades. The versatile Sledges ably covered Jackson 5-style pop-R&B, Philly soul, funk, and disco before they teamed up with Chic's Nile Rodgers and Bernard Edwards to achieve mainstream fame with the title track off We Are Family, a Top Five pop album with addit...