kind of weird question

I was at the market and they had the usual christmas playlist on the speakers, and I heard a song that I liked, thought it sounded vaguely familiar, but didn't recognize it. It was a duet between a man and woman, and I have no idea how to look for it, because the radio station doesn't have the playlist posted online.
But the song reminded me of this movie, and I was hoping it was where I had heard it before, but I don't think so. The style of the song is exactly the type they play in this movie.
Of course this could be just a seasonal or other holiday song; not necessarily christmas. Does anyone have any idea?
I tried to remember a key word, but I forgot. Maybe sky-something, or star-...