Learning to draw the hair

I have always struggled with drawing the hair. I decided to choose this picture of Christina Aguilera because her hair is so beautiful. I think I did pretty well.

It took me about 20 hours

Created with Aquarelle Coloured Pencils and Derwent Fine Art Pencils 
Original: http://userserve-ak.last.fm/serve/500/85115537/Christina%2BAguilera%2BYour%2BBody%2B%2BShoot.jpg
A3