ABBA

ABBA's unmatched commercial dominance makes them pop's most consistent hit machine, with estimated sales of 385 million records worldwide. The Swedish quartet dominated global pop from 1974 to 1982, winning Eurovision in 1974 with 'Waterloo' and placing 18 consecutive singles in the UK Top 10, a streak that outperforms Beyoncé's chart longevity. Their cultural footprint extends far beyond music: the 'Mamma Mia' stage musical (1999) has been seen by over 65 million people, and the 2008 film adaptation grossed $615 million worldwide, proving their songs resonate across generations.