With Nail Art Hollow Hearts you can put them in a nice bow either in color or in multiple colors, so you get either a rainbow on the nail or a beautiful color range to the cutest cute hearts. The Hollow Hearts is the sky is the limit! Low example. a cute butterfly with 2 hearts as wings or make a flower or a four-leaf clover for St. Petersburg. Patrick's Day! With nail art from B4Beauty are you sure you have the largest selection and the coolest ideas, designs and trends.