Recurring Guest Characters Nick Di Paolo 2 guest appearances Patton Oswalt 2 guest appearances Andy Dick 2 guest appearances Rob Lowe 1 guest appearances Bruce Willis 1 guest appearances Justin Bieber 1 guest appearances James Franco 1 guest appearances Roseanne Barr 1 guest appearances Charlie Sheen 1 guest appearances Donald Trump 1 guest appearances David Hasselhoff 1 guest appearances Joan Rivers 1 guest appearances Larry the Cable Guy 1 guest appearances Bob Saget 1 guest appearances Flavor Flav 1 guest appearances Denis Leary 1 guest appearances Demi Moore 1 guest appearances Dennis Rodman 1 guest appearances Cybill Shepherd 1 guest appearances Joseph Gordon-Levitt 1 guest appearances ⇤ « 1 2 3 4 5 6 7 » ⇥