What's the Big Frigin' Difference?!

These Spelling snapshots are hiding more than a baby bump in them. Can you see the sly differences between the two pictures?!**HINT -- There are THREE differences in the above photographs!**

Source: http://www.tmz.com/2012/04/15/whats-the-big-frigin-difference-photoshop-tmz-games-guess-three-celebrity-hunt/

Gretha Cavazzoni Gwen Stefani Halle Berry Hayden Panettiere