The thin-crust pizza can be topped however you like and starts at $11 for a 1-topping heart-shaped pizza in my area (may vary). The limited-time pizza comes uncut so that it doesn't lose its shape in transit.
My local Papa John's also offers the Heart-Shaped Pizza Bundle for $16 (may vary), which includes a 1-topping heart-shaped pizza and a dessert (a choice of either a giant chocolate chip cookie, Cinnamon Pull Aparts, or a giant Double Chocolate Chip Brownie.
You can expect the special pizza to stick around through Valentine's Day at participating locations.
Photo via Papa John's.