In reply to:

There's something about Xmas that brings out the bad composer in a lot of New Zealand advertising copywriters.

Aah, but Xmas also gave us John Clark's "We Three Kings":

We three kings of Orient are
One on a tractor, two in a car
One on a scooter
Tooting his hooter
Following yonder star
Oh, oh
Star of wonder
Star of light
Star of bewdy, she'll be right
Star of glory, that's the story
Following yonder star . .. "

A true Antipodean anthem!