Mathea-Mari has more experience than most of her all-grown-up colleagues. In 2012, at the age of twelve, she entered TV show "Norway's Got Talent" and charmed her way into the hearts of the audience.
In 2013 she played the role as "Annie" in the musical-sucsess with the same name at Folketeatret in Oslo and the year after she won "MGP jr" with the self-written song "#online" in front of a million TV-viewers.
Early 2015 Mathea-Mari lent her fantastic voice to the theme song for the Norwegian film success "Karsten & Petra på Safari", called "Født fri". The now 15-year talent is currently in the studio recording new music set for release 2016.