6.4 stars.
Compared to many Christmas films, 'A Christmas Duet' is more along the lines of picture perfect. This is only because of the great cinematography, lighting, and sets. For drama and humor and entertainment value, however, it falls severely short of the mark for me. The dialogue is the same old stuff. I will say the music was decent, but there wasn't enough. There is only a couple of songs worth of good material with our leads singing a duet in one of them, and the male lead (if he was even a lead) mainly singing his other material. Back to my little side remark, is there a male lead in this? No. Three males share virtually the same screen time.
The lead female is a bit wooden, which is the best word I have to describe her personality for this character. She is not expressive and has zero emotion. She was never happy, sad, angry, or anything, except disappointed. I think if that's an emotion, she has that one figured out. There is no zest to the love story at all. The best part was possibly the pregnant co-owner woman who is expecting at any time, yet her character is very emotional and too silly. If she might be the best aspect of 'A Christmas Duet', that tells you how unsatisfactory it is.