No matter what, I always have expensive designer shoes. It's all about the shoes for me.

No matter what, I always have expensive designer shoes. It's all about the shoes for me.

If you can take it to the next level and really tell an interesting story in a unique and fresh way, then I feel like that's a great song.

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.

I love writing with Adam Lambert. He's really funny and very fun, he's a great friend.

I think the difference between a good song and a great song is... honestly, I think the lyrics, because if you have a really solid melody and solid track and everything is there but then the lyric is just okay, then you've got a good song.

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.