McDonald's launched I'm Lovin' It in 2003 as its first truly global advertising slogan, and the short five-note jingle quickly became inseparable from the phrase. It ran in television and radio commercials around the world for years, making the melody familiar far beyond any single advert. Online, creators began lifting the sound for food content, parodies and ironic brand jokes, where its polished, corporate cheerfulness contrasts with messy, everyday eating. That contrast is why the tiny jingle still works as a meme sound today.