joyous songs

I was going to put together another mini playlist, this one about joy. I actually have a giant-sized list of songs called JOY, but it's long since gone past playlist proportions. And as I was going through the songs, some of them my desert island favourites, some of them songs I play once a year or less, but still capable inspiring a burst of ridiculous, stupid happiness, I wondered about songs that you guys find joyous.

So pony up, kids. What songs are on your (real or just mental) playlist called JOY? What songs never fail to make you smile, or lift your spirits? Which ones make you want to do debilitatingly embarrassing things?