The British beauty, who has a history of bad behaviour, is convinced boozing was making her miserable - and therefore prone to tantrums.
During a year away from the spotlight, Campbell addressed her issues and made some major changes - and now she insists she's a very different person.
She tells Life & Style magazine, ""If people think they know me, they can think again. Most people think they know me because they say, 'We've seen your pictures here and there for years,' but when I'm not working or anything, I try to live a private, quiet life...
""I gave up drinking alcohol. Not drinking makes me a lot happier.""
And she admits travelling between her homes in Moscow, London and New York make her happy too: ""I'm a gypsy. I want to see the new wonders of the world and spend quality time with the people I love.""