Well, not just girls -- he does monsters, superheroes, and other characters too. But I think pretty girls is what he likes drawing best (I mean, his website is www.idrawgirls.com)
I randomly found him on YouTube while searching for old episodes of Smallville. It is astounding what he can do with a digital painting program, more than what most people can do with traditional pencil and paper! Check out this awesome A to Z video of him drawing Kristin Kreuk as Chun Li:
And a bunch of his other work including drawings of Natalie Portman and Iron Man (click for more amazing video demos):