Song ID: i think it's from new zealand?

Anyway, yeah, I think it's from new zealand and i think it was like #1 for a while, or maybe for the longest ever in new zealand's history or something?

It's slow, simple ballad, like it could be played at a junior high dance, and i have the words "This is too good to be true/ you're such a predictable [fool?]/ oh whoa" stuck in my head when i try to remember it. which is every once in a while, so i might as well ask y'all.

I think i first heard it on <a href="http://mixotheque.com/blog/wordpress/";>Mixotheque</a>. But googling that site for the lyrics i think i remember gets me nothing. I thought it was called "Affairs of the Heart" but that turns up nothing too.

Ack.