WHITNEY HOUSTON DEATH MYSTERY UNRAVELS!

Explosive new findings 12 years after fatal drug binge in hotel tub

DRUG-ADDICTED diva Whitney Houston's fatal drowning has remained shrouded in mystery for 12 years. But now tipsters are telling GLOBE the shocking secrets behind the superstar's tragic death ― including the fight over her $20 million fortune and her family's sexual shame!

After the haggard hitmaker's corpse was found submerged in a bathtub at a Beverly Hills hotel in 2012, authorities determined Whitney, 48, accidentally slipped beneath the water.

But the coroner's report also revealed "chronic cocaine use" contributed to her untimely end.

However, a source gabs to GLOBE the Bodyguard beauty's rampant substance abuse is only part of a devastating story that weighs heavily on Whitney's loved ones including her heartbroken 90-year-old mother, gospel singer Cissy Houston!

"Whitney had been an uncontrollable, drugged-out mess, but Cissy still remembers Whitney seemed more upbeat, more excited about life in her final days," an insider confides. "She was convinced Whitney was turning a corner and was shocked when her autopsy showed she had cocaine, Xanax, marijuana and other drugs in her system.