no clue, looks a bit like an "ing ?" bottom-right-thigh, and almost a bit like "for you" center/closer to knee. probably about 5 words were written there between the skirt and the knee if i had to guess. i pulled a bit of extra detail with sharpen/contrast/etc but i didn't have any real skills to work with it so i gave up.
figured someone that knew how to do xray / x-ray photoshop type work could maybe pull more detail out of it.
not even into that type of body writing kink, but it's at an odd angle that she couldn't really have written it herself, more toward the back. really makes me think of bdsm body writing stuff.
and then it seems too cleaned up to be a hidden "easter egg" thing about upcoming music.