Now nanoparticles are not radioactive or anything, but let's put some facts together:
#1 Cosmetics are basically unregulated by the FDA. It's not a food, it's not a drug, and "makes you look hawt" is not a medical claim.
#2 Nanotechnology products are basically unregulated period.
So will your shampoo turn you into grey goo? Not likely. But let me point out another dyad of facts.
#1 Nobody knows whether C60 in your cosmetics is actually harmful.
#2 Nobody knows whether C60 in your cosmetics is actually beneficial for your skin. Basically these products are predicated on the following idea -- 'Whoa, check out this neat molecule! Let's rub it on our faces!' Your face will probably look the same if you rub it with the various dessert-topping ingredients usually found in such products.
On another beauty note, the science of photoshop can be used to increase the beauty of your girl-children into beauty contestants. A rudely hilarious look into this industry is provided by the ill-natured people at SomethingAwful.
Finally, science has given us beauty in the form of flowers that glow.