This version of O Holy Night may be my favorite of all the versions. Celine Dion never fails to amaze me. I know I know, it's Celine Dion, but I still really like her. Her voice is vibrates through me and I have quite a long list of her songs in my faves.
o holy night - celine dion
However, nothing beats Mariah Carey's All I Want for Christmas Is You.
Every Christmas mass since I was a baby, I'd hear this song Hang Belem. My grandfather taught it to me as a baby and I never forgot it. It's very dear to my heart because it was the first song I learned completely and sang it all the time when I was 3. If it's not sung during Viet xmas mass, I throw a fit. I can't find a nice version on youtube, but this clip is from a church choir in Australia. It's pretty much how it would sound in church with the laity so I like it.