I have looked high and low and I'm beginning to think "it's all in your head". No one vocalist has had a hit with Christmas Time Is Here nor is there a vocalist associated with the song... no one other than the children's choir on the original recording. I did stumble across a very nice rendition with beautiful accompaniment that was recorded in 1989 by, of all people, Debby Boone. I really like her version a lot. I'm on my cell phone so I can't post a link but if you search on YouTube, you'll find it.