Whitney Houston's death was due to accidental drowning, a coroner has ruled, but the effects of atherosclerotic heart disease and cocaine use were also listed as factors.
Craig Harvey, the LA County coroner's spokesman announced that drug tests indicated Whitney was a chronic cocaine user.
The coroner's statement said marijuana, a muscle relaxant, an anti-anxiety drug and an anti-histamine were also found in her blood, but were not factors in her death.
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Whitney's manner of death was described as an "accident" and "no trauma or foul play is suspected".
Whitney's sister-in-law, Patricia Houston told the Associated Press news agency: "We are saddened to learn of the toxicology results, although we are glad to now have closure."
The 48-year-old singer died in the bath of her hotel room in Los Angeles on 11 February.
Whitney's funeral took place on 18 February in New Jersey and included tributes and performances from Kevin Costner, Stevie Wonder and Alicia Keys.
Oprah Winfrey, Mariah Carey and Mary J Blige attended the service.
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In her will, Whitney left everything to her daughter, Bobbi Kristina.
The 19-year-old will receive part of her inheritance at 21, more at 25, and then the balance at 30.