There's no doubt about it, celebrity fragrances are big business. In fact, a recent online search for celebrity scents turned up 154 different products at one retailer alone. This makes sense, of course, since fans strive to emulate their celebrity idols. We think we know everything about our favorite stars, from what they like to wear, to where they vacation and who they date. But could we determine what scents they like? We decided to put our sniffers to the test.