The late pop singer was also found to have had cocaine in her system at the time of her death on Feb. 11 at the age of 48, the L.A. County Coroner confirmed Thursday. An investigation revealed that cocaine use and heart disease were contributing factors in her death.
Houston was found unresponsive and underwater in a bathtub at the Beverly Hilton Hotel, where she was scheduled to perform at a pre-Grammys party hosted by mentor Clive Davis that evening. She was pronounced dead at the scene soon after her body was discovered.
Prescription pill bottles were found in her room, The Los Angeles County Coroner' office previously confirmed, but the exact number of pills were not "in alarming amounts." No cocaine was found in the room, according to TMZ.
Houston's private memorial, which was streamed live, took place in Newark, N.J. on Feb. 18 and included guests Kevin Costner, Tyler Perry, Stevie Wonder and Alicia Keys. She was buried next to her father in Westfield, N.J. one day later.