Shoe Pile Game

I found the following photo on Webshots.com. A bunch of girls ditched their shoes at an outdoor dance. There is one shoe whose mate is aparently out of camera shot. However there are 13 identifiable pairs in the photo. For fun, try to identify the 13 pairs. I suggest copying the photo to your machine and using MSPAINT or something similar to draw lines between them or else use the text editor to identify each pair by number. The solution is HERE