I'm a bit of a like girly-girl, really, I like flowery stuff.

I'd like to look like Madonna when I'm her age. I also look at athletes and love their bodies. I've always wanted to be muscly, not skinny. A lot of women yo-yo around, but I'm always aware if I'm getting a bit out of shape. I never look at the scales but I can just tell. It goes on my tum and bum.

I guess I'm just quite observant and I pay attention to a lot of things. Human behavior really fascinates me.

I could always sing, from a really young age, but my voice was really weird. I used to make my mum turn up the radio every day in our house. She was well into music so I got that from her.

Mumford & Sons' music appeals to a lot of America. I'm really proud of them.

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 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.