ABBA, one of the biggest acts in the history of pop music, is probably best known for this song, which is the Swedish group's only single to reach No. 1 on the Billboard Hot 100 chart. The Euro-disco beat, about hitting the dance floor, is one of the most recognizable tunes of the 1970s. Member Agnetha Fältskog recalled: "It's often difficult to know what will be a hit. The exception was 'Dancing Queen.' We all knew it was going to be massive." The group, which disbanded in 1983, was inducted into the Rock and Roll Hall of Fame in 2010.