I don't have an ultimate christmas CD BUT if i were to create my own here are the songs that i'd include:

Run, Run Rudolph-Bryan Adams
Reggae Christmas-Bryan Adams
Little Drummer boy-David Bowie/Bing Crosby
So this is christmas/war is over-John Lennon
Power of love-Frankie goes to hollywood (video is better...the only one they made that wasn't banned!!!)
Thank god it's christmas-Queen
Do they know it's christmas-band aid


That's all i can think of atm..

C