The two men who "take care" of Bart while he is in France are named CÚsar and Ugolin, the male leads from Manon des Sources
Krusty Gets Busted
A Little Night Music: When Chief Wiggum orders the clowns on the police line-up to come out, he says "Send in the clowns", a nod to the musical.
Scooby-Doo, Where Are You!: When Sideshow Bob is arrested, he admits his crime and that he intended to frame Krusty, exclaiming, "I would have gotten away with it, too, if it weren't for you meddling kids," referring to the common ending line of most episodes where the Mystery Inc. kids foil criminal activity.
Some Enchanted Evening
America's Most Wanted: The television series "America's Most Armed and Dangerous" (where Mrs. Botz's true identity is revealed to the kids) is a parody.
South Pacific: The episode title is taken from a song from the 1949 musical.
Bart Gets an F
Simpson and Delilah
The title is a pun on the legend of Samson and Delilah.
Lyle Lanley and his plan to get the town's money with song and dance comes from The Music Man.
Inverted: the Bouvier family iguana being called "Jub-Jub" looks like a reference to "The Jabberwocky" or to "The Hunting of the Snark", but Word of God says that it was just a random phrase coined by the writer, Conan O'Brien.
Many of the Be-Sharps' points of popularity parallel The Beatles.
In the 1980s, Moe's Tavern was called Moe's Cavern, a nod to The Cavern Club where the Beatles got their start.
Barney replacing Chief Wiggum is a reference to Pete Best getting replaced by Ringo Starr.
Bart asking if the Be-Sharps screwed up like the Beatles and said they were Bigger Than Jesus is a nod to John Lennon's infamous quote. Homer then show's him a record called "Bigger Than Jesus" with the Be-Sharps walking on water a la the cover to Abbey Road.
The finale of the Be-Sharps reuniting to sing atop Moe's Tavern is a reference to the Beatles singing on top of the Apple building.
Chief Wiggum watches The Tonight Show with Johnny Carson and The Late Show with Joan Rivers.
There are numerous nods to Citizen Kane, starting with the title.
The opening shot from outside Burns' mansion.
The flashback to Burns' childhood, where he leaves his precious childhood memory behind for a life of riches and cold industry.
Burns dropping the snowglobe at the end of his flashback dream.
Burns tries to cover up to Smithers his dream about Bobo by telling him he was dreaming of The Misadventures of Sheriff Lobo. In the next scene, Homer is indeed dreaming about it.
The guards marching and chanting outside Burns' mansion are based on the W Icked Witch of the West's guards in The Wizard of Oz.
The ending, where Burns, now a head in a jar on a robotic body, runs away with Bobo, with a number of Homer-like humans enslaved by apes, is a parody of The Planet Of The Apes.
Burns' brother is revealed to be comedian George Burns.
The scene where Homer circles the roundabout in front of Buckingham Palace parodies a similar scene in National Lampoon's European Vacation.
Marge vs. Singles, Seniors, Childless Couples, Teens and Gays
Roofi is an obvious parody of Raffi.
The scene of the babies attending the Roofi concert greatly resembles Woodstock.
The kids watching in horror as the "R" in the "Toys R Us" sign is turned frontward, especially Milhouse's expression, is a reference to the famous photograph taken during the Nazi occupation of France.
The scene where the kids make the childless people love children by touching them parodies the ending to The War of the Worlds.
Bart's ordeal references the public shaming of Bill Buckner and Steve Bartman for their baseball-related mistakes. Bartman would be referenced again when Homer (complete with jersey and headphones) catches one of the balls Bart was supposed to catch.
Jimbo, Dolph and Kearney sing an anti-Bart rendition of "Love Stinks" by The J. Geils Band.
At one point, Bart gets hit by a baseball and all his clothes fly off, much like Charlie Brown from Peanuts.
The voice and appearance of the baseball announcer are modeled after Vin Scully, the voice of the Los Angeles Dodgers.
The phrase "The Isotots lose the pennant!" is based on the phrase "The Giants win the pennant!" when the New York Giants win the 1951 National League pennant.
The theme that plays when Bart watches the all fly through the air is based on the score from Rudy.