J.L.
Bob Marley's "Three Little Birds" I want my kids to have it engrained in their brains to not worry and "everything is going to be all right." I used to sing it for my son as part of his bedtime routine but since we shortened that, I use it now when he doesn't want to be still for a diaper change. He always stops wiggling to listen :D
PS-I sing terribly too, but he doesn't know any better :P