- Michael York's character's lines sometimes reflect songs that were in the original musical though cut from the movie. When commenting about Sally he says she's perfectly marvelous. "Perfectly Marvelous" was sung by Sally in the Broadway version. In the intro of the broadway song "Perfectly Marvelous" Sally says, "For example, if I should paint my fingernails green- oh and it just so happens that I do paint them green- well if any one should ask why, I'd say I think it's pretty". In several scenes, Liza Minelli can be seen with teal green fingernails in reference to this line. Also when commenting about troubles they might have when they have the baby, he simply states, "So what!" "So What" was a song sung my Fraulein Schneider in the Broadway version.
- Brian expresses surprise that Sally Bowles is an American, a sly reference to the fact that in the musical on which the movie is based, Sally is British.
- "Tomorrow Belongs to Me" was a traditional German song, sung by the Nazi youth in the movie, to stir up patriotism for the "fatherland".
- The song "Married", originally in the Broadway version, was cut from the movie. It can be heard playing on a radio in the background during the scene where Brian and Sally are discussing marriage.
- In an interview given at the time of the film's release, Minelli said you could tell she was the star of the cabaret the movie is set in because she's the only performer with shaved armpits.
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