Article continues below advertisementMusic fans were stunned after reports surfaced announcing the death of soul legend D'Angelo on October 14, leaving many wondering what caused the legendary singer's passing.Article continues below advertisementWhat Was D'Angelo's Cause of Death? Source: D'Angelo/YoutubeSinger D'Angelo's death was confirmed on October 14. The "Unshaken" singer was 51 when he died in New York following a private battle with pancreatic cancer.