Mel Blanc is a very talented voice actor. You may know him from The Jetsons (Mr. Spacely, and others) or The Flintstones (Dino, and others) or, perhaps more famously, Looney Toons (Bugs Bunny, Daffy Duck and others). This is such a fun, silly Christmas song! It gets a little weird, and not terribly Christmas-y towards the end, but I grew up listening to this, and so it's also really nostalgic for me. Here is Mel Blanc singing Yah Das Ist Ein Christmas Tree.