She began singing traditional Norwegian folk songs in the 1970s .
Since the late 1970s has given concerts and made recordings , winning Spellemannprisen awards ( the Norwegian equivalent of the Grammy award ) in 1979 and 1988 .
She began singing traditional Norwegian folk songs in the 1970s and since the late 1970s has given concerts and made recordings , winning Spellemannprisen awards ( the Norwegian equivalent of the Grammy award ) in 1979 and 1988 .