The title is a reference to the Elvis Presley song of the same name.
While Bart is feeding Santa's Little Helper marshmallows, the song playing is the transition theme for the FXX show, It's Always Sunny In Philadelphia.
Lisa suggests the family watch an Edward Albee play on PBS. The black-and-white segment is a takeoff on Albee's play/film 'Who's Afraid of Virginia Woolf.'