The '(Song) In a Major/Minor Key' meme trend revolves around the auditory and emotional dissonance created by shifting a well-known song's musical scale. Usually gaining traction on platforms like YouTube and TikTok, creators use audio editing software to digitally alter a track—making upbeat pop songs sound like eerie horror movie themes when moved to a minor key, or turning melancholic ballads into unexpectedly cheerful anthems in a major key. The trend exploded with versions of Mariah Carey's 'All I Want for Christmas Is You' and Nirvana's 'Smells Like Teen Spirit.' These memes highlight the power of music theory while providing a surreal, often unsettling experience for listeners who are intimately familiar with the original's emotional tone.