The first step will be to wrap the pink crepe paper around the foam wreath. This will create a uniform background color for the metallic necklaces to blend into. You can use a bit of hot glue to adhere the final section in place.
Begin adding the heart necklaces by gluing the beginning of one to the back of the wreath and then wrapping it until you can hot glue the end to the back as well. Continue attaching the necklaces, alternating colors as you go. Depending on the width and size of your wreath, you may need to squeeze the inner sections of necklaces to account for the curvature of the wreath.