The 'Rolling in the Deep' hitmaker is scared of flying but refuses to take prescribed substances to take the edge of her terror as she fears it will lead to a downward spiral of dependency.

She said: ''m probably the worst flier. I don't take Valium or anything like that because I'm scared I'll be the next Lindsay Lohan, popping sleeping pills.

'Plus I don't want to be out of it if the plane crashes. I want to be aware and call my mum.'

'Mean Girls' star Lindsay recently left rehab after a court-ordered three month stint to be treated for substance abuse problems.

Though the 22-year-old singer hates flying, she loves to travel and broaden her knowledge and experiences.

She added to Q magazine: ''m really interested in lots of things. When I was younger I used to be in class and think I knew it all. I'm really interested in art and literature and film and cooking and sociology and history and travelling, even though I hate flying.'