Poll: What do you have set as your ringtone?

I know I know: Im taking a break....but I couldn't resist just one more question.

Anyway, I got a whole bunch of them because I can download whole songs off of my computer but right now it's set to my son's favorite dancing song: Low: so lame, but he likes it and it's cute when he dances, so I am keeping it for a little while.

What's yours?