Whitney Houston died on February 11th, 2012, at age 48. Houston's death was ruled as an accidental drowning with contributing factors of heart disease and cocaine use. Other substances found in her system were marijuana, Xanax, Benadryl, and Flexeril. They are unsure if she had a heart attack from the cocaine use and then drowned or if she passed form the cocaine itself. There was water found in her lungs so she was alive when she was submerged under water.