Swedish pop group Ace of Base was formed in Göteborg, Sweden in 1990. The band's original lineup consisted of Ulf Ekberg (Buddha), and siblings Jonas Berggren (Joker), Linn Berggren and Jenny Berggren; the two Berggren sisters left in 2007 and 2009 respectively, and were replaced with Clara Hagman and Julia Williamson. Ace Of Base broke through internationally in 1993 with the hit 'All That She Wants' and one year later with 'The Sign' worldwide. Their album 'Happy Nation' (released as 'The Sign' in the USA) went on to sell over 20 million copies.