Sam Smith sings 'Stay With Me' on David Letterman (VIDEO)

Sam Smith sang 'Stay With Me' on Late Show with David Letterman on Wednesday.

This was brilliant as always.

Sam Smith's album In The Lonely Hour is available now in the U.S.

I could listen to this album forever. One of the best of 2014. I can't wait for awards season.

America loves Sam Smith! One of my favorite artists right now. He is incredible.

David Letterman says "keep it it." (Singing). LOL! Of course.