Christmas Question

You know the song Rudolph the Red Nosed Reindeer?

It starts out "You know Dasher and Dancer"... and so on to "...Donner and Blitzen,"

Okay, fine to there. But then: "Do you recall, the most famous reindeer of all?"

If you assume I know those 8, lesser  known, more obscure reindeer, why wouldn't I recall the most famous of all???

These are the thing that keep me up at night,