Eiffel 65’s “Blue (Da Ba Dee)” is featured in Marvel’s Iron Man 3 (2013), appearing diegetically in the film’s opening flashback set in 1999—a deliberate era marker that instantly places the audience in the late-90s/early-2000s pop culture moment. The usage is officially credited in the film’s soundtrack listings (writers and performer), underscoring the track’s status not just as a dance classic, but as a globally recognizable signature that filmmakers can use to communicate time, tone, and nostalgia in a single hook.