Here is some inspiration for you using the Inspired by Stamping free (with the newsletter) Valentine's Day Wreath digital stamp. I just love this beautiful floral heart.
I opened up the file in Microsoft Word and sized it for my card. I printed it on vellum and then cut the vellum with a heart shaped die. I had to offset the die a little to get all the pretty stamp in it! I then colored the back of the vellum with markers and stamped the sentiment from All Year Wishes I (on sale now) on the front.