I was a red head, when I had hair. Kids in my hood used to sing a song to me about it. I taught it to my 5 year old red headed god-daughter. I cleaned it up for her young age. Her mother recorded her singing it and sent me the video via text message. I just crack up every time I watch it. The song went:
"Red head poop the bed,
wipe your butt with jelly bread."