What's the Big Frigin' Difference?!

Say hello to our little differences!**HINT -- There are THREE difference in the above photographs!**

Source: http://www.tmz.com/2012/06/24/whats-the-big-frigin-difference-photoshop-guess-tmz-games/

Carla Gugino Carmen Electra Carol Grow Carrie Underwood Cat Power Catherine Bell Chandra West Charisma Carpenter