Klaus references the Israel Kamakawiwo'ole version of "Over the Rainbow" during a rant that breaks the fourth wall in "Can I Be Frank (With You)". Roger sings "Over the Rainbow" as a Hawaiian ballad in order for Hayley to accept Jeff Fischer's loss and perform as a line judge in His and Stan's badminton match in "Spelling Bee My Baby". Roger's figure and hair is a parody of Hawaiian singer Israel Kamakawiwo'ole.