Whitney Houston died from mixing a cocktail of Xanax and other powerful prescription drugs with alcohol, it has been reported.
Her family has allegedly been told by Los Angeles County Coroner officials there was not enough water in her lungs to conclude she had drowned in her luxury hotel bathtub and in fact died before her head went under water, said gossip website TMZ.
The revelations come as it emerged that her daughter Bobbi Kristina, 18, allegedly fell asleep in a bathtub in the same Beverly Hilton hotel just 24 hours before her mother died. TMZ claims security was called to unlock the door and to help the 18-year-old on that occasion.
Relatives now fear Bobbi Kristina has become suicidal - after she was rushed to hospital twice in the 24 hours following the discovery of her mother’s dead body in the bathtub of a Hollywood hotel.
The teenager was first admitted after allegedly passing out, after drinking alcohol and then taking a sedative pill given to her by one of her mother's entourage to calm her down, upon learning of the devastating news.
She was then pictured being taken out of the Beverly Hilton - the same hotel where her mother had died just hours earlier- on a stretcher at 10.30am yesterday and being rushed to Cedars-Sinai where she was treated for extreme anxiety.
She was released several hours later, but friends and family are still very concerned about her mental state.
Crack cocaine user Houston, 48, was found dead under the bath water in luxury suite number 434 at the Beverly Hilton Hotel on Saturday afternoon, which is said to have been littered with bottles of prescription pills.
Reports vary who found her. Some suggest her aunt Mary Jones discovered her body, while others say it was her hairdresser Tiffanie Dixon.
On Thursday she is said to have gone on a 'wild binge' where she clashed with security guards. The next evening she 'partied heavily, drank and chatted loudly' with friends at the hotel bar.
Bottles of Lorazepam, Valium, Xanax and a sleeping medication were found in the hotel room, it has been claimed.
The drugs were believed to have acted as sedatives, causing her to fall asleep in the bathtub once they had been mixed with alcohol from the previous evenings.
Paramedics battled to revive the singer but she was pronounced dead at 3.55pm, hours before she had been due to perform at a pre-Grammys party at the same hotel.
Los Angeles coroner's office has officially refused to comment on rumours that water was found on her lungs, indicating she had drowned.
It said further details will not be officially released until a police investigation is completed, which may take between one and two months, and revealed no one may visit the body while it is in their custody. But TMZ has reported otherwise.
Houston's ex-husband Bobby Brown, with whom she had a notoriously turbulent 14-year relationship riddled with drug use, was in Nashville at the time of her death and his daughter's trips to the hospital.
Brown - whom she blamed partly for her drug issues - was said to be 'in and out of crying fits' upon hearing the news - but still appeared on stage on Saturday with his band New Edition, and cried out 'I love you, Whitney!' in the middle of the concert.
WHAT IS XANAX?
Xanax, or Alprazolam, is a sedative used to treat anxiety and panic disorders.
It usually comes in tablet form and works by decreasing abnormal excitement in the brain.
Xanax can be addictive and drinking alcohol while taking the drug is ill-advised.
Michael Jackson was known to have been using the prescription drug at the time of his death in 2009 as was actor Heath Ledger when he accidentally overdosed in 2008.
Singer Johnny Gill, one of Brown's New Edition bandmates on tour in Memphis with the star, said: 'Bobby is struggling and he's devastated.'
Brown then cancelled a concert in order to be by Bobbi Kirstina's side and was pictured last night arriving at LAX Airport.
He said: 'I am deeply saddened at the passing of my ex-wife, Whitney Houston. At this time, we ask for privacy, especially for my daughter, Bobbi-Kristina. I appreciate all of the condolences that have been directed towards my family and I at this most difficult time.'
Houston's family also released a statement yesterday expressing their grief: 'We are devastated by the loss of our beloved Whitney. This is an unimaginable tragedy and we will miss her terribly. We appreciate the outpouring of love and support from her fans and friends.'
Celebrities, from singers and rappers to television personalities and business leaders, took to Twitter to express their sadness at the news. Stars praised the singer's unmatched talent and passed on their wishes to her bereaved family, while others expressed their shock at how the award-winning singer passed away at the age of just 48.
'Heartbroken and in tears over the shocking death of my friend, the incomparable Ms. Whitney Houston,' said Mariah Carey, who recorded the Oscar-winning song When You Believe with the late star in 1998.
'Shocked we've lost the immensely talented Whitney Houston!' wrote fellow singer Gloria Estefan. Rihanna tweeted: 'No words! Just tears. I honestly can't think of anything else!!! Feels so strange being at the Grammy rehearsal right now!!'
WHITNEY'S LAST PERFORMANCE AT PRICE'S PRE-GRAMMY PARTY FEB.9,2012