“A sweet 1st birthday for our sweetheart! A year of blessings, laughter and fun, our cupcake is turning one!” Pink hearts pair with lots of sugary treats for a sweet invitation! We used a heart-patterned border to add to the theme on this sweetheart square birthday card design, and we can completely change the graphics and border pattern to suit your own taste and party. See more ideas & personalize this card design here: Sweet Treats Cupcake Birthday Invitation. For a sweet ending to your party, try our Girly Sweet Treat Thank You Cards.