I'm Blue, officially titled Blue (Da Ba Dee), was released by Italian Eurodance group Eiffel 65 in 1998 and became a worldwide number one in 1999. The track tells the story of a man who lives in a blue world, with the chorus built entirely around the meaningless da ba dee refrain. After its chart success it became a staple of early internet culture, spawning parodies, remixes and endless looped edits. Its simple colour theme and unforgettable hook explain why the clip still circulates as a meme sound decades later.