JONI SLEDGE (of Sister Sledge) 2009 solo album "Tru" Joni Sledge, who recorded the dance anthem We Are Family with her three sisters, has died aged 60.Sledge was discovered dead at her home in Phoenix, Arizona, by a friend on Friday.The band"s publicist, Biff Warren, said a cause of death has not been established and that Sledge had not been ill.The family said in a statement: "On yesterday, numbness fell...