Since I was a kid, I've had an absolute obsession with particular kinds of American music. Mississippi Delta blues of the Thirties, Chicago blues of the Fifties, West Coast music of the mid-Sixties - but I'd never really touched on dark Americana.

Karac was 5 years old. So I had him down to my place for a little while just to sort of check him out and we got along great. Freddie Mercury of Queen and Axl Rose of Guns N' Roses were also influenced by Plant.

Best known as the lead vocalist and lyricist of the rock band Led Zeppelin he also had a successful solo career. With a career spanning more than 40 years Plant is regarded as one of the most significant singers in the history of rock music and has influenced contemporaries and later singers such as Freddie Mercury Axl Rose and Chris Cornell.