->'''Duncan:''' You said ''one'' song per episode!
->'''Chris:''' Yeah, but this is a ''reprise!'' Not a new song!
-->-- ''WesternAnimation/TotalDramaWorldTour'', 'Walk Like An Egyptian Part One'

A character performs a musical number; a little bit later, another character tries to do the same thing, but is [[BreakingTheFourthWall informed]], "We've already done that song."

A subtrope of MusicalisInterruptus.
* In an episode of ''Series/TheMightyBoosh'', Howard tries to cheer Vince up by performing a song whose message is that "It's what's inside that counts." A few minutes later, Naboo the Enigma and Bollo start to sing the same song, but Howard tells them, "We've already done that one."
* ''Series/JeevesAndWooster'':
** In an episode (and no doubt in the original story), Jeeves manages to scuttle Tuppy Glossop's budding relationship with an opera singer by having her sing "Sonny Boy" in a talent show the haves are putting on for the have-nots -- the trick being he already got other people to sing it earlier (without Tuppy's knowledge). When she sang she got roundly booed.
** It was at least four times. The plot was to have Bertie perform it before Tuppy, so Tuppy would be booed and the singer would be unimpressed. It had been performed multiple times before Bertie did so, unfortunately the opera singer was running late and didn't see Tuppy's humiliation. Then to put the plan back on track, Jeeves "passed on a request" from Tuppy that his opera singer love should sing it when she arrived. [[ProducePelting The audience threw cabbages]] and she got mad.
* This is a plot point near the end of ''Film/AMightyWind'', as the Folksmen realize that the New Main Street Singers are singing a cover of the song with which they [the Folksmen] intended to open. One of them angrily suggests that they go ahead do the song anyway, figuring the audience will like their version better because TNMSS' rendition is so unbelievably cheesy.
** This happens almost the same way in ''Emmet Otter's Jug-Band Christmas''; as the titular band readies themselves for a talent competition, they hear an entry going before them singing the song they were planning to use. It seems they have only two choices: drop out, or sing it anyway and risk being thought of as copycats. Instead, [[TakeAThirdOption they hurriedly think up and write a new song to perform on stage]].
* In Creator/StanFreberg's Music/LawrenceWelk parody "Wun'erful, Wun'erful," after the applause for the Lemmon Sisters' rendition of "Thank You for All Those Cards and Letters, You Folks Out There in Television [[strike:Land]] Lant," the next singer, "that man with the deep, deep voice, Larry Looper," offers to perform the same song. Welk (or Freberg's impersonation of him) objects, "I'm sorry, that number has been taken."
* In the Cole Porter musical ''Theatre/AnythingGoes'', Moonface Martin sings "Be Like the Bluebird" in an attempt to cheer up Billy after they're left to rot in the brig. When two more characters are thrown in with them, he starts to sing the same song, to which Billy responds "Would you forget about that?!"
* In the film version of ''Film/LittleShopOfHorrors'', Seymour and Audrey are about to go into a reprise of "Suddenly Seymour" right before the climax of the film when a Traveling Salesman cuts them off. "If you two lovebirds would stop singing for just one minute..."
* The opening section of the finale of Music/LudwigVanBeethoven's Ninth Symphony, after two hectic outbursts, proceeds to a lengthy instrumental recitative, with snippets from the three earlier movements which every time are inconclusively cut off. Though the meaning of these interruptions cannot be precisely explained, after a four bar passage ''not'' borrowed from a previous movement but hinting at the real theme of the finale, the instrumental recitative proceeds quickly to a triumphant cadence, followed by an extensive development of the theme. Between this development and the actual singing of Schiller's "Ode to Joy" to this theme, the music returns to the hectic outburst that opened the movement, and a shorter version of the recitative, this time actually sung, with words which may be taken as explanation for the earlier interruptions:
-->"O friends, not these sounds! Instead let us begin to sing more agreeably and more joyfully."
* Played with in Film/TheMuppets when the opening song is reprised at the end. The villain angrily says "will you people stop singing? You've already done this song!" Except he says this ''as part of the song itself''. And the singers ignore him and go on with the song anyway.
* In the ''{{WesternAnimation/Futurama}}'' episode "How Hermes Requisitioned His Groove Back," Hermes Conrad has a song starting "When I was four there was a hurricane in Kingston town". At the very end of the credits for that episode, Zoidberg can be heard starting "When I was two there was a tidal wave in" before abruptly being cut off.
* ''Series/XPlay: TheMusical'' ends this way, with Adam and Morgan's [[ItMakesSenseInContext video game]] beginning a DarkReprise of "Love Me" only to be KilledMidSentence with a [[DropTheHammer sledgehammer]].
* This happens across episodes in ''WesternAnimation/LittlestPetShop2012''. The episode "[[Recap/LittlestPetShop2012S2E21SunilsSickDay Sunil's Sick Day]]" contains the song "Cyril [=McFlip=]," about Russell's detective persona. In the episode "[[Recap/LittlestPetShop2012S3E4SecretCupet Secret Cupet]]," Russell dons the Cyril [=McFlip=] persona again; his friends attempt to sing another version of it, but Russell stops them one line into the song.
* ''Theatre/{{Curtains}}'' gives us this when Nikki shows up with the murderer's gun:
-->'''Bambi:''' She did it!\\
'''The rest of the cast and crew:''' ''She did it, she did it, she did it, she did it, that Nikki is tricky and slick-''\\
'''Cioffi:''' ''[interrupting]'' STOP IT!