"Piano Man" by Billy Joel has been sung before on the show. A few lines were sung by Matthew Morrison and guest star Neil Patrick Harris in Dream On (2010) but it was not properly performed until this episode.
Sue sets up a shrine to Phyllis Diller, who was born in Lima, OH where the show is set.
The modeling agent Sam goes to see uses the same "Trouty Mouth" nickname first coined by Santana.