whouston021111_06_X17WM230.jpgWhitney Houston died at the age of 48 due a lethal combination of Xanax, Valium and alcohol, according to Radar.

A source close to the "I Will Always Love You" singer told the site:

    "Whitney had taken Valium, Xanax, and alcohol, which led to her death. The coroner is waiting on final toxicology results to determine which one of the three was the major contributing factor of her demise."


Houston, who was laid to rest in New Jersey over the weekend, was found dead at the Beverly Hilton Hotel.

The source adds:

    "The coroner will be closely examining Whitney's blood alcohol content at the time she died as well. The sedatives and alcohol will almost certainly be the cause of death, and not drowning. Her heart stopped beating because her respiratory system was suppressed because of the anti-anxiety meds, and combined with the booze it probably happened very quickly before she was found partially submerged in the bathtub."


The official toxicology results will be released within the next two weeks.