What's the Big Frigin' Difference?!

Have I told you lately that these differences are tricky? See if you can spot 'em!**HINT -- There are three differences in the above photographs!**

Source: http://www.tmz.com/2012/07/08/whats-the-big-frigin-difference-tmz-games-photoshop/

小倉ゆず 上原瑞穂 絵色千佳 七海なな