ABBA's glam-tinged 'Waterloo' triumphed at the 1974 Eurovision Song Contest, held in Brighton, England, beating out entries from across Europe. The win catapulted the previously modest Swedish quartet to international stardom, and within a few years ABBA became one of the best-selling music acts in history, with hits like 'Dancing Queen' and 'Mamma Mia' defining the disco era worldwide.
Before Eurovision, ABBA - Agnetha Faltskog, Bjorn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad - were successful in Sweden but unknown almost everywhere else. Their entry, 'Waterloo,' was a deliberate departure from Eurovision's usual ballad fare: a stomping, glam-rock inflected pop song with a title deliberately chosen to be catchy and easily understood across language barriers.
On stage at the Brighton Dome on April 6, 1974, wearing outrageous satin and platform boots, the group delivered a performance so full of confidence that even skeptical juries across Europe were won over. ABBA won decisively.
The victory transformed the group's trajectory entirely. Within two years they were selling records across Europe, and by the late 1970s ABBA had become a genuine global phenomenon, among the best-selling music acts of all time, amassing hits that still fill dance floors decades later. Eurovision, often mocked for its kitsch, had for once served as a launchpad rather than a novelty - proof that its stage could occasionally mint an act of lasting significance.
Key people: Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, Anni-Frid Lyngstad