Another old custom that I've fiddled with again more recently.
The body is a modified ML Invisible Woman from the FF boxset, I shaved it down a lot to get a slimmer look, especially around the thighs and waist, I also shortened the arms and legs to reduce its height (I find I do this a lot with female toy figures), reduced the shoulders and feet and finally added in a spread hand from someone in my bits box.
The head used to be from a wetsuit Lara Croft (3rd pic) with the original Phoenix hair, but after reading the beautifully drawn X-Men Origins Jean Grey comic I decided I wanted her to look less 'homely' and so aimed for something more similar to Mike Mayhew's representation of her. She now uses the ML Scarlet Mitch head (which when repainted and the forehead reduced is actually very nice) and the hair is from HML movie Jean grey.
massprime - I thought that might happen too, but as I found with this one, you can go down pretty far and really give them a good nip/tuck before you see too much guts.... I did keep dremmeling this one though and did end up with gaps, but they just fill up with milliput easily.