Keith Urban invited comedic actor Jack Black onstage for a rousing cover of Charlie Daniels' 'The Devil Went Down to Georgia' over the weekend at the singer's show at the Los Angeles' Staples Center. Cover songs with celebrity guest stars seem to be all the rage on the country tour circuit this year; see Taylor Swift's never-ending and always entertaining parade of guest stars on her Speak Now tour for proof of this unassailable fact.

Dressed in a bright red shirt and a black cowboy hat, Black performed with Urban as though he had found his new and impassioned calling. Given the fact that L.A. is teeming with musical stars and celebrities who could have easily joined Urban on stage, it was refreshing that he went a different route and had Jack Black appear with him. Urban gets extra points for going against the grain with his guest star.

It's worth remembering that Black has appeared in several musical films like 'School of Rock' and 'Tenacious D in the Pick of Destiny,' so this encore with Urban should not surprise any of his fans. Jack Black rocks -- literally!

In fact, Black was so into being on stage with the well-coiffed Urban that after the singer/guitarist thanked him and introduced him, Black ran towards the crowd and took a dramatic bow before exiting the stage. That Jack Black really knows how to make an entrance and an exit.

Watch Keith Urban Perform With Jack Black