Bruce Springsteen – Iron Men of Rock

If you measure your Iron Men of Rock by how long their concerts last, then the clear winner is New Jersey's own Bruce Springsteen.

Despite being over 60 now, Springsteen still delivers marathon-length performances to the delight of his millions of fans. And, over the last 10 years, he's been more prolific with his recorded output than any other time in his career.

The singer and guitarist further upped his superhero credentials sometime around 1984's 'Born in the U.S.A.' album, when he started hitting the gym and suddenly transformed from a scruffy, somewhat scrawny poet into someone you'd expect to be playing football.