Ace of Base is a Swedish pop group, formed in 1987, originally consisting of siblings Jonas, Linn, and Jenny Berggren, with Ulf Ekberg.

They achieved worldwide success following the release of their debut album, Happy Nation, in 1992. Later re-issued as The Sign, it was certified nine times platinum in the United States and was the best-selling album of 1994. One of the most successful debut albums of all time, it was the first to produce three No. 1 singles on the Billboard Mainstream Top 40 chart: "All That She Wants", "The Sign" and "Don't Turn Around".

They continued to score hit singles throughout the 1990s, with songs such as "Beautiful Life", "Lucky Love", "Cruel Summer" and "Life Is a Flower". The group has sold 30 million copies of their first four studio albums, making them the third most successful Swedish group of all time, behind ABBA and Roxette.

Despite being largely inactive since 2012, the group has never officially disbanded. In the last decade, they have released a number of demo tracks, first via their Facebook page, then in 2015 on the compilation album Hidden Gems. A follow-up called Hidden Gems, Vol. 2 was included in the 2020 boxset All That She Wants: The Classic Collection. Jenny Berggren continues to perform the group's hits in solo concerts around the world.