Admittedly, this is not the most musically accurate filk out there. And yes, it is nerderific. Nonetheless, I like the holidays and I like SEO. So, I wrote a song about it, and it goes a little something like this: 
(To the tune of Santa Claus is Coming to Town)
You better code clean
You shouldn’t use cloaks
Better not use
Hidden text links folks.
Googlebot is crawling your site
He’s parsing your pages
And checking your links;
Gonna decide who rises and sinks
Googlebot is crawling your site
He sees it when you link scheme
He knows when you’re a fake
He knows if your content is bad or good
So don’t spam for goodness sake!
O! You better code clean
You shouldn’t use cloaks
Better not use
Hidden text links folks.
Googlebot is crawling your site.
Googlebot is crawling your site.
Happy Holidays!