Guest Stars Alex Désert voices Carl Carlson Maggie Roswell voices Maude Flanders Pamela Hayden voices Rod Flanders Kevin Michael Richardson voices Christmas Choir Singer Kevin Michael Richardson voices Parking Guy Kevin Michael Richardson voices Isotope Stadium Manager Kevin Michael Richardson voices Devil Tress MacNeille voices Irish Mother Tress MacNeille voices Announcer Tress MacNeille voices Christmas Choir Singer Pamela Hayden voices Christmas Choir Singer Chris Edgerly voices Christmas Choir Singer