Mr. Bella is charming and sweet. He's also quite the smarty-pants — literally. Because he has an advanced degree in Physics, sometimes he doesn't realize that theories and equations common to him are not so common to the everyday folk. So the other day, when I was teased for failing to know the difference between a parabola and a bell curve, I asked him a few beauty questions from my world to see if Mr. Mensa really does know everything. And that's the inspiration behind this quiz. So, let's see what you know when it comes to some common beauty basics.