Yep, everyone else on here thinks that its faceapp that you use to get that grin of a cheshire cat out of her but I know that its shoes.
Lol. its amazing. No matter how many pics you take of her. When she has new shoes she is always more lit up than at any other time.
No wonder that she's got so many. She's using that smile as a reward system for you.
That smile of hers is going to bankrupt you matey... Worth it
Shamus.