Barbie Girl — Aqua (1997)

Aqua’s “Barbie Girl” set a speed record in 1997 as the fastest-selling single in Danish history, and its four-week reign at number one in the UK placed it above Tubthumping in sustained chart dominance. The camp pop masterpiece sold over 14 million copies globally, yet none of the group’s eight subsequent singles matched even a fraction of that success—a stark contrast to the typical decline of one-hit wonders.