A pathologist says Amy Winehouse consumed a "very large quantity of alcohol" prior to her death.
Suhail Baithun has told an inquest into the singer's' death that blood and urine samples showed she was 4.5 times over the legal drunk-driving limit.
The singer, who had fought drug and alcohol problems for years, was found dead in bed at her London home on July 23 at age 27.
An initial autopsy proved inconclusive, although it found no traces of illegal drugs in her system.
A British coroner is hearing about the final hours of Winehouse's life Wednesday at an inquest into the soul diva's death.
Winehouse's doctor, Dr. Christina Romete, said the singer had resumed drinking in the days before her death after a period of abstinence.