I'm a big fan of FaceGen myself. When I saw this post and spotted the nice straight-on photo I looked on Google Images and found a profile. With those two images you can generate a really decent 3D head in a couple of minutes complete with texture maps and even morphs (although the morphs are pretty goofy if you are facile with a decent modeler like Modo you can pretty easily tweak them and get good blendshapes).

I timed myself and came up with this (admittedly rough) quick Bjork model in less than 20 minutes. I imported the head into Poser 7 as an OBJ prop and parented it to a Vicky neck and then made the Vicky head/eyes/tongue invisible. This allows you to pose your model as the Bjork head moves appropriately with the neck. If I want a different expression its easiest to trade out one of the morphed targets created in FaceGen.

I included the wire preview so you can see that FaceGen does a nice mesh in quads. Voila.

Obviously, with a little bit of time and effort you could do much much better but I find the hardest part is always getting a decent head mesh with textures and FaceGen is pretty much the bomb in that regard. By tweaking the nose and eyes you could have a fairly convincing model I believe.

Mark