Testing my modelling skills, hope you can identify who this is>>
Let know which areas you think it’s falls down thanks
Sandra Bullock?
the lower face looks like Jessica Biel? I don’t think the profile is accurate. What reference did you use?
If it is JB then the eyes are too big and the bridge of the nose isn’t quite right.
It looks really good, but I think the only problem you have is proportion which can be easily fixed.
There seems to be ( from front view ) too much of here skull appearing above here brow line. The side view looks as though here frontal features are too large for the rest of here skull. If you get on google and do a search for “Skull”, you’ll see what I mean. It’s always good to have plenty of reference on hand to compare against.
Sorry guys, it’s none of thee above. To tell you the truth shes* a tricky one to guess, regardless of my model depiction, though she about as famous as they come.
I’ve taking thee, crits into account, come up with the following I still feel that the side need some work, so Ill leave that for another post.
Bitmap is just a placeholder, so I can guesstimate here facial feature more accurately
I think you may get it this time…
to me she looks like Jennifer Connelly…and my darkside says demi moore…(no way!)
From the many guesses I’ve had on other forums that’s definitely the closest, but still not on the button. 
Christina Applegate?
Soz mate, it’s not her.
I got some grief from another forum, who guess who it was, that it doesn’t look like her… I think mainly becuase she doesn’t have all her human features. So I’ll plug her with eyes and some hair, and see what you think then.