Every day I'd say I look different. Sometimes I look really formal, sometimes I love the classic Stella McCartney, Chloe Sevigny and Gwyneth Paltrow thing. Other days I like being rock star and wearing leather jackets and studs. I love wearing Burberry - it's the perfect combination of formal and punky.
I feel like my figure is a challenge because I'm quite flat chested but I've got a booty so I've got to look for the right things.
On stage I have to be comfortable because I play guitar so I can't wear too much jewellery, it knocks against the guitar and makes loud noises. I had this big gold eagle necklace which I love but I kept whacking myself in the face with it so had to stop wearing it. I wear things that I can sweat in, basically... it gets really hot on stage.
Now, if some panic hits me, you have to sort of be friends with your body, it's like your body will work against you.
I've always been fascinated by the human body, but you can become quite morbid and paranoid if you think too much.
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.
I was quite a weird kid because I didn't like getting presents. I don't know why. I just went for books all the time.
Even when I'm in quite a happy state of mind, I like writing really sad songs. I think a lot of people do.
As a kid I'd lie awake at night and convince myself that a meteor was about to hit the Earth. It's my fatalistic streak, which I've inherited from my mum. I firmly believe something cataclysmic is going to happen in my lifetime and I have to be prepared to run for my life when the time comes.
I started getting these attacks in 2009, just as my music career was taking off. I'd be doing photo-shoots and started to feel like I was having heart attacks. Increasingly I found it difficult to step outside my flat. Things started to get better after I saw a therapist, who told me I needed to make peace with my panic attacks.
It took time to really build myself a reputation as a good live performer, a musician and an artist.
Maybe one day I'll make a record that's really mysterious and no one knows where it came from or what I wrote it about. But thus far, I've just wanted to explain everything properly.
I used to make my manager Jamie not tell me where I was going to be the next day, because I was so afraid of flying and of anything. But now I love flying, I love working hard, I love being around the world.
I got approached by SoBe a few months ago about being an ambassador and I learned about the previous ones including Naomi Campbell, so I was instantly interested! Then I tried and really liked it. It's different and has interesting flavours... we don't have anything like it in the U.K.
