Every time I work with Dr. Luke I learn something new. He's kind of like the Andy Warhol of pop music, where he mass produces his art but it always still has heart and always still has an emotional thread to it. I think he's really a genius and I'm so lucky to have gotten to work with him.

I just want to give people something to dance to, and something to cry to, and laugh to and fall in love to.

I've always felt my spirit animal was a Tiger, so it's funny that now in 'Roar' with Katy Perry - which is a song we write together - there's the line: "I got the eye of the Tiger..." So I feel like there's a little bit of me in there.

It's really liberating and fun to be writing stuff for myself, and really have the freedom to say what I want to say and not really have to think about what somebody else is going to say or have to edit myself to speak from someone else's vision.

I was writing songs as a kid about leprechauns and Catwoman and teapots - whatever it is that little girls wanna sing about.

I was writing songs as a kid about leprechauns and Catwoman and teapots - whatever it is that little girls wanna sing about. The first song I wrote was called "Kitten." It was about a boy named Liam, who I was just crazy about.

Sometimes I write a song and I'm down with it but I'm like yeah, whatever, and then everybody loves it and then it blows up. I'm like: "Okay! I didn't see that coming."