Sonja Annika Maria Aldén is a Swedish singer known best for her 2006, 2007, 2012, and 2020 Melodifestivalen entries, as well as for working together with Shirley Clamp and Sanna Nielsen, along with her songwriting for other artists. For example, she co-wrote the song "Night of Passion" for hard rock/heavy metal band The Poodles, which was their entry for the Swedish Melodifestivalen 2006.
As a student, Aldén attended the Adolf Fredrik's Music School in Stockholm.