You get moments all the time that kind of make you pinch yourself, some of them make you quite emotional. Winning a BRIT was a big moment because we were just so excited to be at the awards in the first place. Selling out Madison Square Garden was pretty amazing too. Then we woke to the news that our UK tour was sold out. It was crazy.

I think when you're writing songs, it's impossible to not draw on personal experiences, whether it be traveling or girls, or anything.

Whatever it takes its fine.

I hate the word famous because it has no substance.

I don't think you can ever get used to being this famous. I've learnt how to keep things separate or at a distance. I've nothing to hide. But seeing this as work, like a job, means I can take a step back. It's me right now in front of you and in the papers but it's not all of me. If you give yourself entirely to the business, you'd end up going mad. And I'm not mad. Not yet.

Age is just a number, maturity is a choice.

I think you have to take me for me. I am who I am.