Waterloo is ABBA's second album, originally released March 4, 1974 (see 1974 in music) in Sweden. It became the band's breakthrough success in the United States, where it was the first release by the group. "Waterloo" was the song that won ABBA the 1974 Eurovision Song Contest.
"Waterloo" is the first single from ABBA's album Waterloo, which was their second album for Polar and their first for Epic and Atlantic. This was the song that won ABBA the 1974 Eurovision Song Contest and began their path to worldwide fame. The single was coupled with "Watch Out" as the B-side.
"Waterloo" is widely known as an English recording by supergroup ABBA but when the group won the pre-selections for the Eurovision Song Contest they sang it in Swedish. The day they won the ESC, the studio recording of this song was released as a single in Sweden.