[1] Kirsten was brought up in a traditional Christian family who sang in a church choir when she was young and later pursued a career deemed appropriate and desirable, working in a bank, where she met her husband, Jorgen.

Both Sir Henry and Kirsten entered the Dansk Melodi Grand Prix, which serves as the Danish pre-selection for the Eurovision Song Contest (ESC), in 1983.

After the contest, Swedish singer Søren later decided to leave Sir Henry in favor of further cooperation with Kirsten, and the duo entered the Dansk MGP in 1984 as Hot Eyes with the song "Det' lige det" with music by Søren and lyrics by Keld Heick (who also penned lyrics to all other Hot Eyes' Dansk MGP entries).

In the meantime, Kirsten began her theatrical career, appearing in a theatre play as well as musicals such as Chess or Les Misérables.

They both appeared on stage as backing singers for Birthe, along with Lei and Lupe Moe, who supported no fewer than ten Danish ESC entries from 1981 to 2002.

Søren also tried his luck as composer in the 1993 and 1999 Dansk MGP, but did not win, and currently runs a recording company called "SB Studio" in Aalborg.

In 1992, she formed a trio named "Swing Sisters" with opera singer Kirsten Vaupel and actor Lise-Lotte Norup, with whom she toured Denmark and several other European countries.