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.

As long as I can reach somebody, then I feel like I'm doing my job.

In real life I'm pretty easy going and pretty chill, I'm not the party girl who will go wild and crazy necessarily.

Obviously I love writing with Katy [Pery], I feel like we're the same person when we write together. Even though we fight a lot, we fight over every line and we pull each other's hair and we cat-fight all the time, it's always worth it in the end.

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

I think I've learnt a lot about bullying and how to deal with bullying and how to get over that and to just be yourself and forget the haters.

When I write for myself, I just get to be myself.