Lady Gaga's drug

By Joanna Crawley

PUBLISHED: 09:04 EST, 23 July 2013 | UPDATED: 10:22 EST, 23 July 2013

Due to hit bookshelves on August 27, Sullivan's book lifts the lid on his days living in New York with the then struggling Gaga.

Ahead of the book's release, Radar Online have reported several excerpts, including Sullivan recalling watching his friend rub a white powder out of her carpet and onto her gums.

'It's mint,' she told him. 'I wish it was coke.'

According to Sullivan though Gaga regularly broke her own rule, allegedly getting her friend to order a delivery of her drug of choice.

Most of Gaga's friends were heavily entrenched in the drug world while she studied at NYU's Tish School, according to the book.

Sullivan recalls a conversation with Gaga in which she said her NYU friends, 'would buy bags and bags of cocaine. ... I'd be out with my friends and you'd catch one of them on the phone with their dads, pretending they needed the money to eat or to buy books or something, and they'd hang up and go to the ATM and take out more money to party.'

A representative for Lady Gaga has been contacted by MailOnline regarding this story.

'I do not want my fans to ever emulate that or be that way. I don't want my fans to think they have to be that way to be great. It's in the past. It was a low point, and it led to disaster.'

'I was completely mental and had just been through so much ... I hit rock bottom, and it was enough to send a person over the edge.'

The Paparazzi hitmaker, who is preparing to release her new album ARTPOP, has admitted in more recent interview that her current drug use extends to smoking cannabis during recording sessions and downing her favourite tipple whiskey, telling 60 Minutes:

'I smoke a lot of pot when I write music. I'm not gonna sugar coat it for 60 Minutes that I'm some sober human being, 'cause I'm not. I drink a lot of whiskey and I smoke weed when I write.'