The couch gag is a parody of the opening of the television sitcom Get Smart.
The transition after Marge says "You've been promoted from side dish to entre" is from the 1966 Batman tv show.
When Bart hits Lisa with a chicken bone, Bart says "Praise the Lord!", in a Martin Luther King style.
Li'l Starmaker is a parody of and this is even referenced in the episode ("Not affiliated with American Idol; we've never even heard of American Idol").
American Idol This is the third episode with the title parodying the film , the other two being " A Star Is Born A Star is Burns" and " A Star Is Born-Again".
This episode seems to draw heavily from Al Jolson's .
The Jazz Singer The city Sideshow Mel asks about during "I'm Talkin' Springfield" is Jacksonville.
Homer's line "Everything I did, I did for you" is a reference to a song from , a musical about a vicious stage parent.
Gypsy Cameron's character could be seen as a parody of the American Idol contestant Clay Aiken.
Also, at one time he is thinking a song of which the beat is the English folk song Greensleeves.
In Lisa's first song, she says she has been to France: The Crepes of Wrath. The Simpsons went there close to the end of Bart-Mangled Banner.
Homer once again shows his talents as a musician (he use to be a part of the BeSharps).
Lurleen Lumpkin can be seen standing in the mall audience. Like Lisa, her musical career was also managed by Homer.
Homer also yells kind words angrily in Postcards From the Wedge.
Lisa is the only one of the family who did not get food poisoning from the vegetables she ate. In Grade School Confidential, her vegetarianism also saved her from food poisoning. However, she pretended she caught it just because she wanted to leave the party without being rude.
Lisa's relationship with Ralph Wiggum is brought up in this episode where he sang the ABC song incorrectly. After he is finished Lisa say "I can't believe I used to date him."
When we see Carl in the audience from behind, he has yellow skin.
Lisa singing about her cat that she lost at Christmas eve is from the episode, Simpsons Roasting on an Open Fire.
Because lisa's French voice actress wasn't a good singer, all of Lisa's songs were performed by good-singer-Bart's French voice actress instead.
When the family fall asleep after getting sick from eating vegetables they are in their normal clothes, but when Lisa comes downstairs in the morning the family are wearing their sleepwear.
Lisa shows Homer a tray with 9 cookies, Homer eats 3 and they are all gone.
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