Almost four hours. That's how long Dave Grohl and his Sound City Players commandeered the stage at the Palladium in Hollywood for last night (Jan. 31). That's a long time for any act to perform, but this was no average show -- or average band. This was Dave Grohl performing with the likes of Stevie Nicks, John Fogerty, members of Rage Against the Machine and more. Grohl did warn the crowd "we're gonna be here for a while," and he didn't disappoint, turning in a once-in-a-lifetime, you-had-to-be-there show.