Personally I think that the gray in back is nice, but the shape bothers me.
As for the doll itself, it's pretty awesome. Only places that don't look perfect are the left hand (her right) where it connects to the rest of the arm (the hand is a bit long and the wrist look swollen), and the right foot (her left) which is a bit shaded like a ball (I feel it should have a bit of a darker area on the right). Also, the hair on the forehead is not perfect like the rest. Perhaps articulate the little dark blob in the middle and AA the hair more softly so as to suggest a slight shadow.
Great work, all in all, and great colors!

Also, If you'd like more help, go to pixelation forum which specializes in giving you useful edits and stuff: http://pixelation.wayofthepixel.net

thank you for the comments everyone! And the good C&C as well.

I tried to fix the arms up and i think the bent one is good now but I have no idea how to fix the other one! I'm totally willing to edit it, so if anyone can give me some tips that would be great!

 Slemsvamp- nope, she's not rihanna, she just has the same haircut:P

This is wonderful, welldone :)

the shading on this is amazing! Beautiful!

The art is great but the BG looks bad. In this case is better to leave a squared white BG than a transparent one with a rare white surrounding the picture.

Another nice piece of work from you. My only one crit is the hand on the arm that is hanging down. At the moment it doesn't seem to have much definition to show that she has a wrist.

Her face is just excellent:)

Loving the hair but agree about left arm/wrist.
Amazing shading though :)

I''m not sure if you should leave the white triangle between her arm and body.

I agree about the boneless thing; don't be afraid to leave some sharp lines to your anatomy! The dithering is gorgeous though.

she's pretty. good job

Wow, great, I was expecting it to have like hundreds of colours

Her feet look quite rough due to the dithering and her right arm seems boneless- No definition of where the wrist is- but at a glance I'd say it's absolutely stunning

Rihanna? Anyway, I'm not the right guy to give you criticism but this is awesome. And this is by no doubt the best piece in your gallery. Great!

Technique and texturing are superb.
The only issue for me is an arm length - if she put down arm on a waist her elbow will touch her hip. Maybe her neck would need more clear definition.

Also her feet feel like copied and pasted - two left ones, I would reshape her right foot to rotate it toward the viewer.