I've seen how much effort has to go into a tour, the performance and also how to look after yourself, not just physically, but mentally too.

I work with a trainer called Ruben Tabares. He's a nutritionist, strength and conditioning coach, and an athlete. So I literally just train like an athlete.

I find my dress sense tends to be a bit of a mixture between high fashion and unique vintage pieces with a little bit of street trends. For example, I might find a really nice, suede dinner jacket that I'd wear with a basic plain white shirt and some chinos and a pair of Nike trainers.

Artists take on an alias that's suitable for their style of music. Everyone had a nickname when they were younger.

If I go to an awards ceremony, I wear a suit, of course I do. I am proud to be there. If there are young kids looking at pictures of me, I want them to feel that they should long for the opportunity to go somewhere really smart and wear a beautiful suit, rather than to reject that.

The way everyone in London is right up against each other makes it very real to you growing up, the fact that people have different lives to you. And that causes problems; of course it does.

I didn't take it seriously myself at the time, but now all of my old teachers are supportive. Even my principal - I sold out the O2 Arena in London, and he came out to see me, which was really cool. I actually put a picture with him on my Instagram, and I think and he's wearing one of my snapbacks.