I like this Birthday song from Wierd Al Yankovic:

Well it's time to celebrate your birthday it happens once a year we eat a lot of broccoli and drink a lot a beer you should be good and happy that you have so much to eat a million people everyday are starving in the street your pappa's in the gutter with the wretched and the poor your mamma's in the kitchen with a can of Cycle 4 there's garbage in the water and poison in the sky I guess it won't be long till we're all gonna die

Happy Birthday Happy Birthday to you

What's a matter little baby think your party is the pits enjoy it while you can, we'll soon be blown to bits the monkeys in the pentagon are gonna cook our goose their fingers on the button, all they need is an excuse it doesn't take a military genius to agree we'll all be crispy critters after world war III there's nowhere you can run to and nowhere you can hide when they drop the big one, we all get fried

CHO

there's more, but you get the idea