I've been close friends with Katy since teenagers, before she was Katy Perry. She's always been a great resource for me to pull from and watch - from her choice of how public she wants to be about her personal life on down. I also watched her develop from the coffee-house singer-songwriter I knew to her be to playing arenas and killing it.

I have a reoccurring dream that I'm in the ocean in New Zealand and everything is completely upside down, because it's on the other side of the planet.

It's nice to really have the freedom to write what I want.

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'm a really visual artist, and I love writing treatments for music videos, photo shoots, fashion, and all the visual parts that go along with making an album.

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.

Cheating is bad. That's a big mistake I've made, and I've really hurt people. I've never lied about it, though. I've always been honest.