Olsson has provided accompanying and background vocals on tracks by numerous top-selling artists, from Jennifer Lopez to Britney Spears, Celine Dion to Ariana Grande, and many others.

Olsson signed her first publishing deal in 2001 with Kobalt Label Services, with her songs recorded by such artists as Kelly Rowland and Kate Ryan.

Olsson moved from Stockholm to Los Angeles in 2010, continuing to sing backing vocals.

Olsson's is one of the voices on the movie scores for Soulsurfer and Rock of Ages, and for the Mickey's Soundsational Parade that premiered in 2011 at Disneyland California.

Olsson sang a cover version of "Edelweiss" for the opening credits of the television series The Man in the High Castle.