What is the name of this movie.?

I need to know the title of a comedy film about a guy who judges women on there outward appearance and is hypnotized to see women for there inward appearance. In other words if a women is really nice they would look really Beautiful to him and if they were really nasty they would look really ugly to him. in the movie he dates this really fat girl that he thinks is skinny because he has been hypnotized.