It looks like Amy Winehouse has fallen off the wagon -- again.
The Sun is reporting that a bedraggled Winehouse was seen downing a miniature bottle of vodka at the liquor counter of a shop in London on Thursday morning, just before checking in for treatment at a rehab center.
An eyewitness recalled the troubled singer's condition in the store. "She seemed out of it. She was stumbling about, slurring her words."
The person continued, "I was shocked to see her buy vodka so early in the day, and even more shocked to see her knock it straight back."
Just minutes later the 27-year-old singer, dressed in a tracksuit and sporting her trademark beehive hairdo, stormed into the restroom of a nearby hair salon. After using the facilities, she reportedly told the staff, "I just puked all over your bathroom."
One of the customers is quoted saying, "I felt really sorry for the staff. I think they were too scared to say anything."
However, Winehouse's spokesman denied that the singer threw up at the salon and said that the singer's comment was a joke.
The spokesman also added, "Amy's embarked on treatment at The Priory [a rehab center]."
Winehouse has a well-documented history of drug and alcohol abuse as well as self-destructive behavior since bursting into the limelight in 2007 with her Grammy-winning sophomore album 'Back in Black'.