My girls have personality, of that there can be no doubt.

This is the simplest pure white background setup. The girls are sitting in front of a 2x3 soft box on a Profoto B10 set to deliver f/4 light on their backs. The key light is a Profoto Umbrella Deep White M about three feet directly in front of and above them, pitched heavily. A Profoto B10 was firing into the umbrella set to deliver f/4 light. So, two lights, two stands, a medium umbrella, and a 2x3 soft box all set to deliver an f/4 exposure.