There were a couple of surprises at Keith Urban's concert Saturday night at Staples Center in Los Angeles.

Midway through the evening Urban welcomed John Fogerty to the stage. The two of them performed Fogerty's Creedence Clearwater Revival mega-hit, "Proud Mary."

Later, as part of the encore, Jack Black joined Urban for the trademark Charlie Daniels song "The Devil Went Down to Georgia." It was fast and wild and Jack Black nearly lost his clothes while doing some gymnastics.