Hearts aren't just for Valentine's Day, they are forever.
These are foam hearts from a crafts store. I glued transparent 7gypsies paper all over them, and painted them with acrylics. Very easy, lovely result.
This is the one I made from scratch, using wire, paper and plaster. More labour intensive and more drying time, but so worth it.
Simplicity is the removal of the useless and the unnecessary--source unknown