DAMN! AMY BOUGHT COKE, HEROIN, ECSTACY & SPECIAL K BEFORE HER DEATH!

Amy Winehouse's final hours on Saturday were spent in a drug haze of ecstasy, cocaine and ketamine, according to friends.

Although an exact cause of death has yet to be determined, those close to the 27-year-old singer told The People that Winehouse went on a wild drug and alcohol binge Friday night, which likely contributed to her untimely death.

One source told the British newspaper that Winehouse, heartbroken over a breakup last month with director Reg Traviss, was seen buying drugs believed to be cocaine, heroin, ecstasy and ketamine in the hours before her death.

"She was out in Camden on Friday evening, but seemed determined to carry on the party back at her flat," a source told the paper. "None of us know who was with her into the early hours of Saturday. But getting out of it was clearly her main priority of the night."

Other friends told the Sunday Mirror they believed the "Rehab" singer, who completed a brief stint at the Priory Hospital in May, may have died after taking a "bad" ecstasy pill and then combining it with alcohol.

"It was an ecstasy overdose," said the friend. "She could do cocaine until the cows come home. But this was obviously a dodgy pill."

An autopsy was scheduled for Sunday, although police were "operating under the assumption" Winehouse overdosed, a source close to the investigation told TMZ.

Winehouse's body was discovered on Saturday afternoon by a bodyguard in her three-story Camden home.

According to Scotland Yard, "Police were called by London Ambulance Service to a house in Camden Square NW1 shortly before 16.05 hours on Saturday, following reports of a woman found deceased."

Police have also stated that "there have been no arrests in connection with the incident."