I just stumbled across this band. They are from Scotland (hence the snow comment?), but they do a duet with Martha Wainwright who i think is a country / alt country singer from Brooklyn:

http://www.youtube.com/watch?v=FDY6IrpF5nM

She has a pretty unique voice and the interplay between the two of them is very powerful.

NB - this is not a link to a Rick Astley video, unlike this link, which is: http://www.youtube.com/watch?v=eBGIQ7ZuuiU