Popular music has always been rooted in the blues, whether it's Adele or Led Zeppelin or Sam Cooke. It's just the beat that changes.

With Led Zeppelin, it has always been that mystique of how the music is done - how it works, why it works.

I really don't listen to Led Zeppelin that much.

If you listen to our work, from 'Led Zeppelin I' to 'Coda,' it's just a fantastic textbook.

I just picked up a lot of classic-rock, melodic influence from my mom, music that she listened to, like 10,000 Maniacs, Led Zeppelin, REO Speedwagon and Yes.

From the first album, Led Zeppelin was always going to be a totally new approach from what had gone before - whether it was approaching the blues or folk music like 'Babe I'm Gonna Leave You': nothing existed like that.