Blue eye makeup is the boldest trend for this season. For me the easiest way to wear it is with a vibrant blue eyeliner. Enter: Mary Kay at Play Bold Fluid Eyeliner in Blue My Mind ($10, available on May 16). The cobalt shade swipes on easily for a cat-eye look. Plus, it's tiny enough to carry in the smallest clutch or travel makeup bag, so you can do touch-ups on the fly.