Contostavlos, 26, said her autobiography 'Think Carrie Bradshaw on a drugs charge' sounds like a bestseller already, reported Daily Mirror.
"It's a tell-all book. I write about everything. It's written in a novel style, every moment written as it happened. I started last Christmas and I'm still writing it now. I even write about guys I was seeing at the time. But I've changed names.
"There will be sceptics out there who'll say, 'She can't write a book, she hasn't even done her GCSEs' but I've got a genuine story to tell," she said.
"I admit to things I'd never normally admit to. You read about me with a bottle of vodka on a Christmas Day in a darkened room, having crazy nights out with friends and the moment that I am found innocent.