An impressive crowd of superstars gathered to honor American veterans at the Concert for Valor in Washington, D.C. yesterday, including Bruce Springsteen, Foo Fighters frontman Dave Grohl and Zac Brown, who collaborated on a performance of the Creedence Clearwater Revival classic 'Fortunate Son.'
ZZ Top frontman Billy Gibbons dropped in to perform two songs with John Fogerty during the former Creedence Clearwater Revival frontman's recent concert in Tulsa, Okla., and thanks to the almighty Internet, you can watch it for yourself right now!