You can't really tell it by my current wardrobe full of glitter and skirts, but growing up, I was not one of those girls with a collection of frilly dresses. In my elementary school years, my wardrobe staple was a pair of red cowgirl boots. In my middle school years, I was partial to my "Billy Keller Basketball Camp" basketball shorts and this furry-feeling orange tank top. (Yeah.) But through all my wardrobe transitions over the years, I've always had a thing for hearts. We've always gotten along. ;)
First you need to lay out the lace on the inside of the cardigan.
Next you need to pin down the lace to the cardigan and trace the outline of your heart.
Stitch around the outline and make sure the lace does not shift. Take out the pins when you're done.
Carefully cut the heart from the cardigan, leaving the lace layer below. That's it!