UPDATE: According to TMZ, Houston's hairdresser and bodyguard were the first to find the singer with her face underwater in the bathtub in her room at the Beverly Hilton Hotel. A mix of Xanax and alcohol probably caused Houston to lose consciousness and drown in the tub. An autopsy has been scheduled, but a final verdict on the singer's cause of death may be delayed up to 6 weeks pending a toxicology report.
Just a few days ago, Houston was spotted leaving a Hollywood nightclub, disheveled, with scratches all over her body. Tragic.