The 'Rehab' singer - who was hospitalized in August after a drugs overdose - insists life is "too short" for her to amend her hell raising ways.
She said: "Life's short - just do it. I've made a lot of mistakes.
"I always say I don't regret things and I don't say sorry, but I do really. I believe strongly in fate. I believe that everything happens for a reason."
The troubled 24-year-old singer - who was arrested last week for possession of cannabis in Norway - admits she drinks to overcome her insecurities.