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Published 13:48 2 Nov 2015 GMT

However, the singer - who released his debut solo album recently - has now realised that some of the best work he has created has been while sober.
He added: "The drinking was all part of the garret, the romance of the swinging lightbulb, the dedicating my life to unpaid art idea. Tortured in my 20s - all part of that."Explore more on these topics:
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