I used Blender 2.72 and Gimp 2.8. I used a basic particle system with lighted spheres and set the aperature way down. I placed the camera inside of a box with a heartshaped hole cut out. Then I set the material to a hold out. Then I passed it through glare and blur to soften and brighten the image. Then I finished off the image in Gimp to add a couple of lense flare effects to fill in a few of the empty black spaces.
