Missing a button on your favorite cardigan? Don’t worry, we've got you covered. In today's Fab How To, we show you how to sew on two- and four-hole buttons. It's a great, basic wardrobe skill to have, and it's really simple once you get the hang of it. You can even use this quick trick to personalize pieces you already have in your closet. Watch and learn how to sew a button now! On Allison: StyleMint top, LuvAJ ring.