Ace of Base is a Swedish pop group that gained international fame in the mid-1990s. The band is composed of Ulf Ekberg and siblings Jonas Berggren, Linn Berggren, and Jenny Berggren. Notable for their blend of reggae, pop, and dance music, their distinctive sound is characterized by catchy hooks, strong melodies, and the contrast between the Berggren sisters' harmonizing vocals. The group's debut album, "The Sign," brought them global popularity and has been recognized as a defining record of the Eurodance genre.