Excellent pixelling of the face. The bra is inconsistent in shading, contrast and level of detail, and it gets boring because of it. A light and shadow play as elsewhere would have made it more sexy.
The nose seems a bit off perspective but other than that this is terrific, very well done!
I like this piece and I think you done pretty well with highlighting from the use of only a 4 colour palette. Good Work
Really like the pose, nice work c: