I honestly like that she's shiny, I assumed she had some kind of oil on her skin. This has a lot of style, it feels very distinctive. Her skin is so realistically molded out, and yet you kept the lines, keeping all the attitude of the sketch intact while still adding such stunning detail. Her eyes really stick out at you. She has lots of little highlights all over her, like she is in a photo shoot with lots of spotlights all pointed at her. Her pose is just right, her hands look like they are resting gently as opposed to weighing down on her, a very flirtatious stance. You even set her heel forward on her sandals, like the heels are really making her feel those G's. That's an awesome detail.

The one thing that kind of kills the illusion for me is her top. Her breasts are bunched up as though the straps are tight against them, but there aren't any strings along the other side that would allow it to be that tight without slipping off her nipples and into the middle of her chest. Particularly with how the straps seem to fold underneath her breasts, it seems like there would have to be some killer static electricity making that work. The hair is a little awkward at the roots and tips also, the roots don't look like they are going to curl back into her scalp. The rest of the hair looks really cool though. Her eyebrows look a little bit uneven, unless she is supposed to be quirking her brow, in which case the other eyelid should look like the brow is bearing down on the inner side. Also, with how her head is slightly turned to the right, the ear on that side would be pointing more towards behind her than how far out to the side it is.

She's that girl at the beach that makes the other women feel inadequate, hehe.

Okay, first off, I absolutely love this picture. She's very sexy, and all the details of her body have been included; the anatomy is spot-on. Her hair is amazing, and her costume is quite clever.
The jewelry is a little excessive, but not quite enough to have a negative impact on the picture.
Her skin is too shiny, though, and that makes it look a bit unnatural. Her hands are a little off, but then again, hands are very hard to draw well. Also, her eyes appear to be missing pupils What bothers me the most, though, is her pose. With the way she's balanced on her legs, it looks like she could fall down any second.
Overall, excellent job. The only question I have is: Can I have her number?