* EarWorm: The song composed by Frank Loesser.
* HollywoodHomely: Baby swans are more or less identical to ducklings except for feather color.
** It's probably more a case of "beauty is in the eye of the beholder" since the other ducks still shun the titular ugly "duckling". Interestingly, in some versions where the old woman briefly takes him in, she comments on his ugliness, as well.
* TheWoobie: The title character. Seriously, who didn't want to hug the poor little guy.