Mr. Lisa's Opus/References

Cultural references

 * The title of the episode is a reference to the film .
 * Homer imagines Albert Einstein inventing the Led light up shoes.
 * The Devil mentions and references the Flaming Moe drink being expensive there.
 * In the song "Those Were the Days":
 * The song is a parody of the theme song for .
 * Homer mentions Nirvana and .
 * Marge mentions Jar Jar Binks and characters from Star Wars.
 * Homer and Marge mention Richard Simmons.
 * The sign "Harvard College Even Our Dropouts Are Billionaires" is a reference to Bill Gates, who dropped out of Harvard to found Microsoft.
 * Pictures of Presidents and, both Harvard graduates, are hanging on the wall in the Harvard Admissions Office.
 * Homer sings "" by and  when he starts to act like Grampa.
 * "Remembering You" by, the end theme for All in the Family, plays during the end credits.
 * Amazon Alexa forces college students to continue chugging Duff Beer at Harvard College.
 * Homer mentions President Kid Rock.

Continuity

 * The title screen is a Christmas version of The Ned-liest Catch's.
 * Lisa has a poster of the Doe-Eyed Boys on her bedroom wall. ("Friend with Benefit")
 * Leon Kompowsky appears and sings new verses of "Happy Birthday, Lisa" with Bart. ("Stark Raving Dad")
 * Grampa previously stated Homer stopped drinking in the future. ("Holidays of Future Passed")
 * In Homer's vision, Moe brings back the Flaming Moe. ("Flaming Moe's")
 * Homer and Marge sing a new version of "Those Were the Days". ("Lisa's Sax")

Goofs

 * When Lisa is seen as a baby, Marge's hairstyle is the one she had in That '90s Show, though she always had her hair up in a beehive since she was pregnant with Bart.