Update: here is her bio. She is from Norway and was a brief time a professional so maybe semipro would be better description.

http://obscurena.org/marit-minniva-borresen/

I do not quite know how Grammy Awards work but this is an amateur who along with Susanne Scherer from Moonsun are just incredible talents. Scherer on comments has been compared to Tarja. Tarja and Floor Jansen both incredble singers and far better then most who do pop today. I actually prefer both Tarja and Floor to Adele although Adele has a fantastic voice. Maybe I just prefer the classical voice although Minniva does not seem classical.

Enjoy this cover. I wish she dumped the guitar playing which broke up the song and flow.