I Need A "poofy"dress..

Hi. A bunch of my friends are throwing a Hallowen party, and they are all going as video game characters. They have ellected me to go as `Princess Peach` from Super Mario Brothers. So, I am in need of a poofy pink dress. Just wondering if any of you gals have anything horrible from the 80`s in your closets. You know, those icky formals with the huge ruffled sleeves and huge bows. It would need to be about a size 18. Color does not matter to me, I could dye it if I needed to...and I am only looking to spend $15-$20 max. Let me know if you have anything in your closets!! Thanks!! :)