I have one to get us started....
Around 2013, there was a photo series of a very cute barefoot girl on the OLD publicfeet site (yes, it was generally a terrible hive of scum, and the new one isn't much better, but there WERE some nice pics on there if you looked hard enough).
My guess is that she was in her late teens, and at a formal event. The photoshoot I know for certain was taken in the Carmel City Hall grounds (Carmel, Indiana). The girl had fair skin, long brown hair past the shoulders, a purple formal dress and no shoes in sight.
Very similar dress here:
She was completely barefoot in every photo - her soles are not visible but she oozes class, for a classic "jackpot" contrast between bare feet and formal attire (Mike123 - right up your street!)
Two of them have her resting on a bench near a gazebo and holding a passion flower, but I'm curious to know if there were more photos in the collection. The photos themselves would have been shot any time between 2007 and 2012.
The photos were uploaded on the old PF by a user called Bemused - I believe he has maybe posted on here once or twice? I asked him where the photos came from, he said they were "public domain" - I have not seen them on google, flickr or any stock photo site.
At the risk of making myself sound utterly terrifying, I've tried every search combo possible (senior sessions/homecoming/prom).... nothing. Though I did get this sort-of lookalike of the girl:
Help much appreciated if this jogs anyones memory, and in turn, I'll help anyone myself if I can with their own enquiries. Thanks.