Nail art is about to get a lot easier. Revlon has just released a line of Nail Art Stencils, $4.50 each, with designs perfect for Halloween. This Sweetly Sinister collection features spiders, skulls, stars, and even funny little moustaches. All you have to do is stick one of the stencils onto your nail (bare or with dry enamel), then paint over it with polish. Once dry, simply peel off the stencil, leaving behind your own tiny masterpiece. Now you have to decide: Sinister or sweet?