One of my rules is: Never listen to your old stuff.

I don't listen to my old stuff very often at all.

I listen to everything from Lady Gaga to Lady Antebellum. I've got Frank Sinatra. I've got old stuff, new stuff. Iggy Azalea. I've got everything.

I don't listen to a lot of new stuff. I just like the old stuff. It's all quite dramatic and atmospheric. You'd have an entire story in song. I never listen to, like, white music - I couldn't sing you a Zeppelin or Floyd song.

If you go out and just play the old stuff and never write new stuff, you're not really a complete musician, you're a performer.

There's money in the old stuff, but there's more wealth created in the new growth areas.