Celebrity Halloween costumes are generally fun and creative, but some celebs take it too far. Hilary Duff and her boyfriend Jason Walsh are both under fire for dressing up as a sexy pilgrim and a Native American. Hilary has since apologized, but this is not the first time fans were outraged over a celeb's costume. There have been plenty of guilty offenders in the past — and you probably forgot all about them.
Click through the gallery to see controversial celebrity Halloween costumes throughout the years.