Bloody Mary Variations

Everyone knows this urban legend, but I'm curious if anyone else has regional variations of it. I'm well aware of the queen of scots origin, but in rural Kansas my community had a different version. According to our community the origin was about a woman called Mary who was murdered while she was pregnant and buried in a field near our school. She's called bloody Mary because she's supposedly covered in blood when she appears, and for us you couldn't just chant 'bloody mary' in front of a mirror alone in the dark. You had to chant 'bloody Mary, bloody Mary, I have your baby, I have your baby' three times, as she's said to wander the earth looking for her baby. Now, I don't buy into this at all, I just think it would be interesting to hear other variations