Murielle Mathieu does everything well and this is very nice version of White Christmas.
"Christmas in Killarney" is an Irish-American Christmas song written by John Redmond, James Cavanaugh, and Frank Weldon, copyright 1950.
There are several excellent versions, but this is my favorite by Dennis Day.
I listened to many different versions of this wonderful Carol, but this version by Susan Boyle is the best.
Why? Because of the reverence and Spiritual feeling she brings to it.