Undertale The Musical refers to a 2016 animated music video by YouTuber LHUGUENY, which parodies Lady Gaga's Bad Romance to retell the story of the indie game Undertale. While originally intended as a fan tribute, the video's distinct animation style and the catchy chorus became a massive internet meme years later. It is frequently used in bait-and-switch videos where a different song suddenly cuts to the musical's chorus. The meme thrives on irony, nostalgia, and the surreal nature of the animation, making it a staple of modern internet shitposting culture.