Received my Ultimate Supremes Xmas CD recently and have been listening to this track frequently as well as Silent Night. It's really a crime they left her tracks off the final album. I did like Mary's vocal on the Christmas Song as well, that would have made for a great inclusion as well. There's something very heavenly about Flo's voice on O Holy Night though and if she could sound that good with just being a background singer, I can only imagine how great she'd have sounded had she gotten the proper training that Diana received. Where my Flo fans at?