Majestic, The Easter Egg - piano teacher crossover

At time index 1:07:40 (which is during the Welcome Home Luke party), the town's piano teacher, Irene Terwilliger, takes the stage to accompany Luke in a piano duet.
In 1952, Dr. Seuss wrote a movie titled "The 5,000 Fingers of Dr. T" whose antagonist was a menacing piano teacher, Dr. Terwilliker.

The spelling of their names isn't precisely the same, but the resemblance is uncanny.