Kelly Osbourne confessed that most of her problems started in childhood, when she moved in America from England and couldn't adapt, being called by her classmates "f***ing fat immigrant".

Kelly admits she started drinking alcohol and using drugs at an early age, thinking it was really cool what she was doing.

She says, "I moved from the countryside in England to Beverly Hills when I was 12, and I did not have friends. I mean, I would sit in class, and a kid would whisper in my ear, 'Go back to England, you f***ing fat immigrant,' and I'd be like, 'Mom, get me out of here!'

And then an older friend of our family thought it would be funny to take me and my brother to clubs. I think I was 13 when I went to my first one. I got drunk and was like, 'This is so fun - people like me, and they're not making fun of me.'

Then I'd tell kids at school, and they kind of thought I was cool because I went."

And Osbourne believes that her older friends should of not have allowed her to drink or to do drugs at that age.

She adds, "I was the cool little girl they were showing around LA. I think they saw me as interesting because of who my family was, and I had money and strong opinion.

I'd make them laugh because if someone said something to me, I'd tell the to f*** off, and I don't think they'd ever seen a little girl do that."