Bathtub Drowning

From 2012:
Coroner says Whitney Houston accidentally drowned in bathtub
The singer suffered from cardiac disease and could have had a heart attack before drowning, officials say. Cocaine is listed as a contributing factor in the death.

Read the full article here: http://articles.latimes.com/2012/mar/22/local/la-me-03-23-whitney-houston-20120323