This might give you some ideas:
The Blogger's 12 Days of Christmas
On the first day of Christmas,
my true love sent to me
A widget in a sidebar.
This is a really well done parody (which you'll especially recognize if you recently watched this hilariously bad one), though if you've never blogged or done websites, some of the references will be lost on you. In that case, trust me, it's both funny and geekily poignant to those of us who have.
I think Writer Chick's version is greatly improved by the fact that you only have to hear the lyrics in your head. The original is actually boring as hell, once you've listened to it a couple of times — and of course, we've all heard it a few hundred times by the age of 8.
h/t to Dustbury