Lady Gaga's cocaine use described in a book

Lady Gaga's friend Brendan Jay Sullivan has revealed the 'Born This Way' hitmaker's cocaine use in his new book 'Rivington Was Ours: Lady Gaga, the Lower East Side and the Prime of Our Lives'.

The 27-year-old's friend, Sullivan, describes the popstar's drug use in his new book, which will be released on August 27, reported Aceshowbiz.

Sullivan recalls a moment when he spent some time with the singer at her home in Lower East Side. The writer says that Gaga rubbed white powder to a bubble gum and told him,

"It's mint. I wish it was coke."

Gaga allegedly said at that time, "I used to do bags and bags of it. Mostly when I was getting ready to go out, while I was putting on my makeup. I'd get a delivery and then put on some Bowie and treat myself in the mirror. But I only ever did it alone. That was my one rule."

Later, however, Sullivan says that Gaga asked him to get a delivery of cocaine.

"I just agreed to score drugs for us both and spend our entire night smoking way too many cigarettes and talking way too fast about ourselves. Then I started to worry. She had a recording session in LA the next week. What if it ruined her voice?," Sullivan says in the book.

He adds that in another occasion, the singer told him that her friends called cocaine "Judy".

Gaga admitted that she used to do drug in a September 2010 issue of Vanity Fair.