In My Africa: A clear reference to The Beatles' album, Abbey Road. Brain's cousin Cheikh is possibly a reference to the character of the same name in the Beatles' film "A Hard Day's Night."
Muffy and the Big Bad Blog: The name of Francine's and Muffy's jointly owned blog is called "She Said, She Said." This is the title of a song from the album Revolver.
The Agent Of Change: Binky mentions a character from the movie "Trucks" named "Rita the Meter Maid." This is a reference to the song "Lovely Rita," a song off of the album called Sgt. Pepper's Lonely Hearts Club Band.
The earliest Beatles reference can be found in the episode "Arthur's Spelling Trubble." When Arthur is reading his dictionary, one of the entries is called "Abbey Road."
Arthur, It's Only Rock and Roll: Whenever Francine, Fern, and Binky are chased by the preschoolers, they had a music chase sequence, in the style of "A Hard Day's Night." Also, in "Manager of My Dreams," the Backstreet Boys are wearing uniforms resembling those worn by the Beatles during the Sgt. Pepper's Lonely Hearts Club Band era.
The yellow submarine poster
In the episode "The Secret Origin of Supernova," a model of a yellow submarine is seen on a shelf in Freddie K's store. This could be referencing the song (and movie) "Yellow Submarine." A yellow submarine is also seen on a poster in the Sugar Bowl in several episodes, including "Sue Ellen Chickens Out".
