The viral music video of the moment is right here.
It's probably going to be compared to Numa Numa (but not break any records–Gangnam has 1.7 billion views).
The question for the marketer, music or otherwise, isn't, "what are the hooks and tricks I use to go viral?" No, the question is, "is it worth it?"
What does the fox say has the hooks and tricks in abundance. It has Archie McPhee animal costumes, nonsense words, just the right sort of production values, superfluous subtitles, appropriate silliness. It would probably help the cause to add spurious nudity, but give them points for getting the rest of it right.
To what end?
If your work goes viral, if it gets seen by tens of millions of people, sure you can profit from that. But most of the time, it won't. Most of the time, you'll aim to delight the masses and you'll fail.
I'm glad that some people are busy trying to entertain us in a silly way now and then. But it doesn't have to be you doing the entertaining–the odds are stacked against you.
So much easier to aim for the smallest possible audience, not the largest, to build long-term value among a trusted, delighted tribe, to create work that matters and stands the test of time.
"Baby bump bump bay dum."