McDonald's launched its I'm Lovin' It campaign in 2003, pairing the slogan with a short, singable jingle that soon played in television adverts around the world. The melody proved unusually sticky, turning a fast food slogan into a piece of pop culture that people could hum from just a few notes. Years later, creators began reusing the clip online for food hauls, cravings jokes and parody adverts, keeping it familiar to new audiences who may never have seen the original commercials.