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Amy Winehouse had been on a three-day drug binge before she was hospitalised last week after collapsing at her home.
The painfully thin Rehab singer - who was rushed to hospital last week after passing out at her home - allegedly took a cocktail of ecstasy, cocaine and ketamine, mixed with vodka, whisky and lager during the mammoth session with her husband Blake Fielder-Civil.
A close friend of Blake's, who was at the house party, told Britain's The Sun newspaper: "She looked like a zombie - white as a sheet and trembling. And I'll never forget her eyes. They were dead, like a shark."
The 23-year-old star's bender began just hours after she flew back to London from a Chicago music festival at Hounslow's The Robert Inn on Monday afternoon.
The star downed pints of lager and made several trips to the bathroom with her husband in the two hours they were there.
The couple then headed to their local pub, Camden's The Hawley Arms to continue partying late into the night.
Amy was next spotted acting "very jittery" at a café near her north London home on Tuesday and demanded hot food.
She then threw an impromptu house party, where her excessive drugs consumption and lack of sleep is said to have finally taken its toll and she started convulsing.
A friend of the couple said: "Amy had boasted she hadn't slept in three days.
"Blake telephoned friends at 10pm, yelling 'she's having a fit!'
"The word went around like wild fire. Friends rushed around to help, and Blake calmed Amy down by giving her water before taking her to hospital.
"He was terrified - but she was a mess. She didn't know what was going on."
Amy - who was given an emergency adrenaline shot and had her stomach pumped at London's University College Hospital before being released on - checked into London's The Priory rehab centre a day later.
Worried family and friends fear the singer - who received three MTV Video Music Award nominations this week - will die if she does not put a halt to her crazy-party lifestyle.
- BANG! SHOWBIZ
