This is one of the songs that featured at least 3 separate arrangements across Celtic Woman Christmas albums.
Silent Night? 
There’s the original with Méav singing and Máiréad Nesbitt on the fiddle, the Home For Christmas with Méav singing without Máiréad’s fiddle, and the purely instrumental version on The Magic Of Christmas.
There’s also the group performance Voices Of Angels version, but I’m unsure if it counts as VOA isn’t a Christmas album. I believe it is included in The Best Of Christmas, though?