Eiffel 65 were an Italian dance group, including the producer Gabry Ponte, who made one of the defining europop novelties of the late 1990s. "Blue (Da Ba Dee)", released in 1999, with its robotic vocoder vocal and its endlessly repeated "I'm blue" hook, became a worldwide phenomenon, topping charts across the globe and lodging permanently in the memory of anyone who heard it.
The group had further success in parts of Europe, but to the wider world they remain entirely tied to that one impossibly catchy song, which has aged into a nostalgic dance-floor and meme staple.
On streaming, "Blue (Da Ba Dee)" sits near 771 million plays across its versions, while their next genuinely different track trails far below. That puts the ratio above 7, past our 5.0 line.
By our measure Eiffel 65 are a certified one-hit wonder, and an archetypal europop one. Theirs is the quintessential novelty-dance story: a single, gloriously silly, instantly recognisable hook that conquered the world for a year and then stood, decades later, as essentially the whole of what the group is remembered for.