That is an absurdly sneaky and very classy way the artist hid their signature as part of the shadowing on the underside of her right thigh. As someone whom has had art stolen before, I totally approve. Then outright applaud at how well done they did it.

And, on a second look, they added it to her blouse top, the inside lining of her jacket, and further down the same right leg. The lower leg is a bit too obvious, once you know where to look, but it still **works** as shading, which is genius.