This is a really simple makeover. If you can sew a straight stitch on your sewing machine you can do this. It is a really girly fun way to spruce up some personal space.
Here is the before. I took my pillow right off of my bed to show you what it looks like. I sleep with 400 count cotton sateen pillowcases. Plain boring cream pillowcases.
I took another 100 % cotton white pillowcase and I added the lace. It would be nicer to use 100% cotton lace. What I used here were left over scraps and they were polyester. I sewed the 3 inch lace on the seam of the pillowcases hem. On top of that I sewed the ruffled lace in place with just a straight stitch. Over that; to hide the top of the ruffled lace, I sewed a 1/4 inch white satin ribbon on the top and bottom. Sewing the top and bottom will keep the ribbon from curling in the wash. And that's it. From boring to super girly in 30 minutes. To be shabby chic use scraps on both of your pillows and they won't match.