All three children took music lessons, and Berggren, along with her older sister Malin, practiced violin.

Educated to become a teacher, Berggren studied classical music and sang for her church choir with her sister.

During the late 1980s, the Berggren siblings, along with close friend, Ulf Ekberg, formed the techno band Tech Noir.

Berggren put her plans to become a teacher on hold when Ace of Base was signed to Danish label Mega Records, with the band's debut album eventually selling more than 30 million copies worldwide.

[4] Berggren's mother was stabbed in the hands, and the woman, a 21-year-old German named Manuela Behrendt,[5] was banned from returning to Sweden.

Later, with sister Linn's sudden withdrawal from the spotlight and beginning with the single "Life Is a Flower" in 1998, Berggren was forced into a more prominent vocal role.

[6] The trio did not get a record contract with the songs that were produced and Berggren continued working on her own solo material.

[8][10][11] During this time, Ulf and Jonas recruited two other female vocalists, Clara Hagman and Julia Williamson.

[12][13][14] When this came to the fans' attention, Jonas and Berggren independently stated that this new group would not be called Ace of Base, but would use another name.

[13][15][16] This alternative line-up later presented a slightly changed name: "Ace.of.Base", but this was mainly a graphical adjustment used on the cover of their releases only.

Berggren was revealed on 3 February to be a wildcard for the Danish national final for the Eurovision Song Contest 2011 with her entry "Let Your Heart Be Mine".

Berggren continues to volunteer her time to various humanitarian charities and has staged several Christian concerts as well as regularly singing in churches.