Celebrities like coming on the show
The Pawn Stars show likes to host celebrities when given the chance. It adds excitement and brings up ratings for the show. Different celebrities have made appearances over the years such as Bob Dylan, Steve Carrell, and Katie Couric. They come into the shop with their own items.
As for the celebrities they often have a hidden agenda. They’ll come on the show in order to promote a new movie, show, or album. Some of them are also genuine fans of the pawn stars themselves and want the chance to meet Chumlee, Rick, and Corey.