Breaking News: Gregg Allman, Southern Rock Pioneer, Dead at 69

Tom Petty and Eddie Vedder: 'The Waiting' (YouTube)

Petty and the Heartbreakers' recent Amsterdam gig reached a whole new level of rock & roll power when the band invited a flannel-clad Vedder onstage to add his mammoth growl to their 1981 smash.

The 100 Greatest Artists of All Time: Tom Petty