Maybe I just blocked it.
In any case, here's Meco's "R2-D2, We Wish you a Merry Christmas." From 1980 and RSO Records. And how profoundly we wish it wasn't.

Adding insult to injury/The Horror!, I am reliably informed that a teenaged Jon Bon Jovi makes his recording debut on this track (as part of the children's chorus).
Oh -- and did we say Merry Grimble to all?
[h/t Eric C. Boardman]