Photographer Sarah Silver has been hailed the Master of Controlled Spontaneity in an article on Lookbooks. Here's a snippet from the full interview:

There are several defining features about the way you shoot. How would you describe your photography style?

My style is about balance, a sort of yin and yang. For example, if I am shooting in the studio I enjoy the control I have over all the variables. At the same time, I love breaking the rules of the set. For instance, I will create an environment then change it and try something entirely different -- it is controlled and spontaneous at the same time.