Her official cause of death was ???drowning, effects of atherosclerotic heart disease and cocaine use???.The singer was buried in a New Jersey cemetery next to her father after a funeral service that was attended by friends, family and stars such as Oprah Winfrey, Tyler Perry, Alicia Keys, Kevin Costner, Mariah Carey, Mary J. Blige, Jennifer Hudson and Robert Flack.Share on WhatsApp To receive upd