In her early career Linnea sang in several choirs and she toured with Ace of Base and Carola.

Also, she has been choiring for several different albums and songs, one of them being "Cara Mia" with Swedish artist Måns Zelmerlöw.

Also, Linnea and her production team wrote and produced JoJo's comeback single "Save My Soul".

Linnea has also co-written the Polish artists Margaret's single "Cool Me Down" which was sold double platinum in Poland and gold in Sweden.

In 2016, "Oh Lord" was released with the British vocal harmony boy band Mic Lowry, which was their debut single and it was written by Joy, Linnea Deb, Anton Hård af Segerstad, Augustine Grant and Phil Collins, as the song contains lyrics and music from Phil Collins' song "In the Air Tonight".