My Drawing: Portrait of Shannon Upton

I felt a kinda passion one hour ago(around 12 o'clock at night) and could not control my mind. I just felt like I wanna draw sth, if I did not do this drawing, maybe I can't go to sleep. So I picked one of my friends as the figure whom I was gonna draw. Because I am not good at drawing female figures, I thought this drawing would be a great challenge to me.
This whole drawing took me almost one hour. The materials are the most simple things: one pencil plus a piece of paper.



This is a drawing I've just finished.