[4][5] De Forest began singing at the age of nine and sang with her mother in the Steve Cameron Gospel Choir for several years.

[8] When de Forest was 18 years old, she ended her collaboration with Neill and moved to Copenhagen to study at the Complete Vocal Institute.

[8] De Forest was one of ten acts that performed in the 2013 Dansk Melodi Grand Prix for a chance to represent Denmark at the Eurovision Song Contest 2013 in Malmö, Sweden.

[9] On 26 January 2013, she performed the song "Only Teardrops" (written by Lise Cabble, Julia Fabrin Jakobsen and Thomas Stengaard) and won the national selection.

[16] On 7 February 2014, de Forest uploaded a video that spoke about her third single "Rainmaker", explained the meaning of the song, and previewed it.

She also talked about enjoying success after winning Eurovision last year, "I've been performing my music around Europe, released my debut album and written a lot of new songs – to be honest, I'm living my dream!".

[19] On 3 August 2014, de Forest announced via Facebook that she would perform the first single of her yet untitled album, "Drunk Tonight" at Amsterdam Pride 2014.

[21] De Forest participated in Dansk Melodi Grand Prix 2016 as a songwriter of the song "Never Alone" performed by Anja Nissen.