I have seen girls with out make up who look just amazingly beautiful, or girls who just don't wear make up simply because they have self confidence and don't look to bad. That being said, there are girls out there that do need make up. An exstensive amount of make up is just rediculouse. A good example of this is goth/punck girls/guys. In which I laugh at simply because if they get wet they look like they are melting like the witch in The Wizerd of Oz and that is ALWAYS funny to see.
But in the end it comes down to the person, some need it and some don't, and those who do need it usualy need just a little.