What she is, is an underrated singer with a huge voice that is more than enough to handle this understated song. So enjoy it (and curse Scott that we can't post her brilliant "Senses Working Overtime" here.)
I don't know who James Newton Chadwick is, but after hearing how well he covered Grimes's "Oblivion", I want to know more. The original is very much a keyboard song, an electronic masterpiece. Chadwick turned it into a folk music classic, without resorting to cheap Grimes impersonation, which would have been the easy route.
I expect to explore more of his music in the coming weeks.