I find male singers and what they sing about fascinating. It makes me realize how little we know about ourselves and how little I know about myself. It's interesting to see the male perspective.

Well, on tour I eat terribly, so I balance that by running a lot. And then I started to run with my fans in certain cities. It sounds very nerdy and un-rock n' roll, but I like it. It's fun, and it's better than meeting fans in weird, awkward circumstances. So I take them running with me.

'I Know You Care' is about my dad. And I haven't seen him for a long, long time. And my parents divorced when I was really young. And I guess I just wanted a - it was my way of saying that I wasn't bitter or angry anymore. I was just sad and just felt like something was missing.

I met Prince William at a musical festival and he let me know he was a fan of my music. But the invitation to sing at his wedding reception came completely out of the blue. The fact that Kate and William knew the words to my songs was very touching.

Every so often I'll go back down to earth and I'll make reference to a phone or a house or something, something that's a bit more real. But I suppose what that does, is it puts you in a surreal place but also my music doesn't get too carried away in that sense, which I quite like.

I was the first person to go to university from my family.

Drake, I'd like to collaborate with. He's a phenomenal lyricist. Probably the best rapper in the world at the moment. I love Kanye but there's something about Drake; he's more straight up, really clever and really poetic and metaphorical - I love that. He's just clever.