It’s hard not to notice when companies use celebrities to promote their products or champion their cause. Our heads turn when we see faces we recognize whether we respect them as an authority on an issue or not. There are many notable examples of celebrities promoting charitable causes as well. Chances are, you have noticed Bono and his work with (red) and Live8, Brad Pitt’s commitment to help rebuild New Orleans, or Mike Holmes’ campaign for SOS Children’s Villages.