It's pretty good, but like
>>290731said her shoulder is too round, and looks like it has no bone/muscle shape. It's also too close to the center of the body; I know she's reaching back, but the lack of a shoulder blade on her left side makes it look strange. Her left shoulder blade would be sticking out more/distorting the tattoo more if her shoulder was actually twisted back that much. Also where the tattoo crosses her lower back just above her underwear, it looks too flat and makes it seem like she has no butt. Try foreshortening the tattoo in that area to give it more shape. As for her eye, it is too high and also too wide. If you want more realism the eye will be shaped more like this (> than like this (_).