R &B singer Vesta Williams, who died in her sleep in a California hotel room on Sept. 22, 2011 — her cause of death has finally been revealed. Vesta’s close friend and singer Norwood Young received word from members of Vesta’s family that she passed away from complications of an enlarged heart. The Williams family was given the autopsy report a “day or two ago” according to Norwood. He said that obesity and stress may have also contributed to Vesta’s untimely death. “This news could not come at a more appropriate time,” said Norwood, who added that Vesta’s life and career will kick off a series of TV One specials entitled “Unsung,” that will air on January 2, 2012 at 10pm Eastern time.