Joni Sledge, one of the four women who comprised Sister Sledge, has died at age 60.
The four sisters came into prominence at the peak of the disco era with the classics "He's The Greatest Dancer," and "We Are Family." Their other hits included "Lost In Music," a remake of "My Guy," and "Frankie."
She is survived by her three sisters. At this time, the cause of death is unknown.
RIP, Joni. :(