What is this movie name called?

Ok I used to love this movie when I was little The beginning starts
with a girl in the back seat well no seat actually and just in the
floor in the car and her parents are in the front seat. (I only
remember some parts and thats all) And then I remember the girl's
parents getting turned in to pigs and then I remember the girl being
in some place having to work and clean. And then I remember a huge
baby that was mean and trapped the girl in his stuff. And then I
remember this big dirty person that the girl had to clean and then a
spirit came out of all the mud and stuff after it was clean and at the
end of the movie the girl had to choose the right 2 pigs that are her
parents to get them turned back to human. That's all I remember. I
really love that movie but I forgot the name to it. Any ideas?