The singer claimed she used booze to help her write songs when she was younger as she thought it would make her more 'honest'. 

She told The Sun: 'I used to have to lock myself away in my house, get pretty drunk and write a drunk diary - and that was the first time I could admit things to myself. 

'A drunk tongue is an honest one in my opinion and the next morning I would read it through with an awful hangover and, in the cold light of day, had to absorb my feelings about myself. 

'I was a bit scared that I wouldn't be articulate enough.' 

She has previously admitted that her second album 21, was inspired by an intense and brief affair. 

Adele added: 'When I was 18 or 19 I didn't regret anything, I was very much a teenager and thought I knew it all and that there was nothing else I could learn. 

'I started realising my own flaws and my disappointments and I started regretting a lot of stuff. It was quite an awakening.' 

The singer also revealed that one of her tracks was turned down for the soundtrack to Jake Gyllenhaal's film Love And Other Drugs. 

But the star wasn't letting rejection getting her down - she still harboured ambitions of one day writing the soundtrack for a Martin Scorsese film.