Brett Warren is a photographer based out of Nashville, TN who studied under Annie Leibovitz. You can definitely see the Leibovitz influence in his finished work and in how he lights his subjects. For most of his work he uses a single light source balanced with natural light, which is very similar to some of the behind the scenes videos and images we've seen from Annie Leibovitz herself.
In addition to his amazing photography, Brett also designs almost all of the clothing used in his shoots. He's definitely a talented guy. Check out more of his work at his website HERE.