Ring Around The Rosie 
Well, I hope this is creepy enough for your challenge lol
I chose 'Ring around the Rosie' as my nursery rhyme, but the version I was listening to when I got the idea was the one from the Dead Space 2 trailer, which goes like this:
Ring around the rosie
Pocket full of posies
Ashes, ashes
We all fall down
Ring around the rosie
What do you suppose we
can do to fight the darkness
in which we drown?
Ring around the rosie
This evil thing, it knows me
Lost ghosts surround me
I can't fall down
You can hear it HERE
Hope you like it!
