Most of us don't own metallic eyeshadows because we hardly use them. And rather than letting them sit around and get thrown away once they expire, it's better not to invest in them. Well, if you're looking to add some glitter to your matte eyeshadows, all you need to do is rub some highlighter on your eyelid once you've put on your eyeshadow. Blend the two with a brush and you'll end up with a metallic eyeshadow look.