History Main / DiegeticSoundtrackUsage

* In the ''Series/DonkeyHodie'' episode "Big Nest Bird Party", Donkey sings the "A hee and a haw and a haw and a hee" part of the show's theme song while walking.

* In ''Theatre/PokemonLive'', the show opens with the Johto Pokemon theme before being interrupted by Giovanni's commercial, and Ash listens to the original Pokemon theme on the radio.

* Two examples in the Bernstein/Sondheim musical ''Theatre/WestSideStory.'' When Anita arrives at Doc's store, met by the confrontational Jets, one of them turns on the jukebox, which plays a simple reprise of the "Mambo" from the dance at the gym. Then, when Doc goes downstairs to meet Tony, the boy is whistling [[DefectingForLove "Maria"]] to himself.

** In one of the ''Knuckles the Echidna'' comics, Knuckles has Vector crank his headphones up to MakeMeWannaShout levels to blow out a wildfire. Vector does so with the comment "Here comes that ''Top Ten'' fav - '''''Sonic Boom!'''''", with a note from the editor confirming that the music is indeed the song with that name from ''[[VideoGame/SonicTheHedgehogCD Sonic CD]]''.

* In ''ComicBook/TheSmurfs'' comic book story "Bathing Smurfs", Handy is heard singing ''WesternAnimation/TheSmurfs1981'' theme tune as he returns to the village from his hiking trip, with the words superimposed on a music scale. Some Papercutz English translations of their stories such as "The Clockwork Smurf" and "The Finance Smurf" also have this as the substitute for whatever songs the Smurfs originally sang in their original French versions.

* In the ''WesternAnimation/DonkeyHodie'' episode "Big Nest Bird Party", Donkey sings the "A hee and a haw and a haw and a hee" part of the show's theme song while walking.

* While ''WesternAnimation/TheIncredibles1'' doesn't have a proper theme song, the most-repeated motif from the score is called "Mr. Incredible's Theme". Bob Parr can be heard humming this melody when he returns home after a night of clandestine superheroing. In addition, one of the DVD {{Easter Egg}}s shows Mr. Incredible dancing to a swing version of the theme.

* While ''WesternAnimation/TheIncredibles'' doesn't have a proper theme song, the most-repeated motif from the score is called "Mr. Incredible's Theme". Bob Parr can be heard humming this melody when he returns home after a night of clandestine superheroing. In addition, one of the DVD {{Easter Egg}}s shows Mr. Incredible dancing to a swing version of the theme.

The in-universe usage of a show's theme music (or another item on the soundtrack) within an episode. Generally only used if the theme is itself a freestanding song rather than a TitleThemeTune.

* In ''Bluey's Big Play'', a stage play based on the popular Australian cartoon ''WesternAnimation/[[Bluey]]'', the theme tune is played on Bandit's phone as the Heelers play musical statues. During a few points in the game, they can be heard singing or humming along with the tune.

* In ''Bluey's Big Play'', a stage play based on the popular Australian cartoon ''WesternAnimation/Bluey'', the theme tune is played on Bandit's phone as the Heelers play musical statues. During a few points in the game, they can be heard singing or humming along with the tune.

* In the 2012 movie adaption of ''WesternAnimation/TheLorax'', you can hear "Thneedville", the opening song, to the film play during the seed chase scene.

* Two examples in the Bernstein/Sondheim musical ''West Side Story.'' When Anita arrives at Doc's store, met by the confrontational Jets, one of them turns on the jukebox, which plays a simple reprise of the "Mambo" from the dance at the gym. Then, when Doc goes downstairs to meet Tony, the boy is whistling [[DefectingForLove "Maria"]] to himself.

The usage of a show's theme music (or another item on the soundtrack) within an episode. Generally only used if the theme is itself a freestanding song rather than a TitleThemeTune.

* In ''ComicBook/TheSmurfs'' comic book story "Bathing Smurfs", Handy is heard singing ''WesternAnimation/TheSmurfs'' theme tune as he returns to the village from his hiking trip, with the words superimposed on a music scale. Some Papercutz English translations of their stories such as "The Clockwork Smurf" and "The Finance Smurf" also have this as the substitute for whatever songs the Smurfs originally sang in their original French versions.

* In ''Fanfic/EmpathTheLuckiestSmurf'', the Smurfs theme song from [[WesternAnimation/TheSmurfs the cartoon show]] is consistently referred to as "the Smurf song", even by its characters. In "The Grouchiest Friendship", Empath learns the lyrics of the song during his first visit to the Smurf Village. In "Smurphony Of The Night", Empath uses the tune to disrupt the effect of the MindControlMusic that Lord Vladimir Smurfula uses on Smurfette.