Which 1999 song by Eiffel 65 became the Italian group's only US Billboard Hot 100 top-10 hit?

Eiffel 65’s 1999 song “Blue (Da Ba Dee)” became the Italian group’s only US Billboard Hot 100 top-10 hit.

The song was released as the lead single from Eiffel 65’s debut album, Europop. Its most recognizable feature is the heavily processed, robotic vocal hook built around the phrase “I’m blue.” The production combines Eurodance rhythms with bright synthesizers and a repetitive chorus.

“Blue (Da Ba Dee)” topped charts in several countries, including France, Germany, Ireland, the Netherlands, and the United Kingdom. In the United States, it reached number six on the Billboard Hot 100 in 2000. The track’s worldwide success made Eiffel 65 a defining act of late-1990s and early-2000s Eurodance.

A common mix-up is calling the song simply “Blue.” The official title includes the parenthetical “Da Ba Dee,” which reflects its vocal refrain. Eiffel 65 later had additional success in Europe, but “Blue” remains the group’s signature international hit and its clear American one-hit-wonder moment.