Joan Elise Sledge

Joan Elise Sledge (September 13, 1956 – March 10, 2017[4]), better known as Joni Sledge, was an American singer-songwriter and producer. Sledge was best known as a founding member of the American family vocal group Sister Sledge. Sledge died from natural causes on March 10, 2017 at age 60.
The cause of death is, at this time, unknown, according to Billboard. The Philadelphia real-life sisters (Debbie, Joni, Kim and Kathy Sledge), rocketed to fame with their songs and strong family values at the height of the disco era. Their breakout record We Are Family peaked at #3 on the US Album Chart and went Platinum with such hits as ‘He’s the Greatest Dancer’, ‘Lost in Music’, and the title track.