"When she came out of the bathroom, she was like, drunk," said Alexis, a Haitian who spoke through a Creole interpreter. "She was unable to walk, falling, and was unable to handle her talking."
Alexis, who tended to Smith and her baby daughter for more than three months in the Bahamas, said she saw a burned spoon in the bathroom, suggesting Anna Nicole was getting injections.
Stern, Erosovich and Dr. Sandeep Kapoor are accused of conspiring to supply excessive medications to an addict.
Alexis went on to describe turmoil in the household.
She said Stern pleaded to Smith for a commitment ceremony in order to sell the photos to make money to pay for Smith's son's burial.
Alexis said Smith was hysterical at the funeral, reaching into the coffin to cradle her son.
Though she had received one injection already to calm down, Alexis said they had to give her another so that she would release the body.
Alexis' sister-in-law, Nadine Alexis, also testified in the trial.
Nadine Alexis said many kinds of drugs were in the house, including painkillers, muscle relaxants and sedatives. She said Erosovich set out cups for Smith, some containing as many 10 pills each.
Both nannies were flown to the Los Angeles trial from the Bahamas. They described how Smith was left sick after taking the medications, including diarrhea and vomiting.
The Associated Press contributed to this report.