Four head sketches in my sketchbook, 2nd page of the head drawings

So, this is the second day of my tiny head drawings and i drew four of them today. Also instead of plain face i am trying to see if i capture some emotions, like the first one has her eyes closed and was supposed to be smiling but i made her lips too short. This will be a lesson for tomorrow.

Second one is a plain face with good hair style.
Third one is a smiling women but it looks more like she is being forced to smile and she is crying. Weird. I don't know what went wrong.

I had to add a few more pencils for these because the 2b's aren't just dark enough.

Fourth one is a girl winking at someone or something or may be just giving a pose for the camera...

You can find all the reference images in this Pinterest Board

Here are the heads, individually....