What's the Big Frigin' Difference?!

There are some really phat difference in these snack filled photos. Do you have what it takes to spot the subtle changes?**HINT -- There are three differences in the above photographs!**

Source: http://www.tmz.com/2012/08/19/whats-the-big-frigin-difference/

America Ferrera Amerie Amy Cobb Amy Smart Ana Beatriz Barros Ana Hickmann Ana Ivanovi Ana Paula Lemes