A lot of people, Lady Gaga and Katy Perry and a lot of people have written for other people, and of course Bruno Mars. So I think it's a great way to break into the industry and show people what you can do and show them your talent and people tend to listen a little differently to your own music as an artist, when you've proven yourself as a good songwriter for other artists.

I got called to write for Aerosmith, nothing ever came of it, but I ended up spending the day with Steven Tyler and going to his house and we sat down at the piano, just me and him, and he sang for me and played, then he asked me to sing for him, and then we sang harmony together. That was just a big moment where it was like 'oh my god, my life is crazy!' It was really cool.

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.

It's just funny that anybody would care at all to take apart the words that I write. It's kind of cool!

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

There's a feeling that you get when you write songs where... it feels like it's destined to do something. Then sometimes you get that feeling with a song and it never goes anywhere, that happens all the time too, so you never really know.

I think one day I'd like to win an Oscar.