What's The Big Frigin' Difference?!

Looks can be deceiving, but don't let this gorgeous couple distract you from the task at hand. Can you find the subtle differences behind the overwhelming beauty?**HINT -- There are THREE differences in the above photographs!**

Source: http://www.tmz.com/2013/04/28/whats-the-big-frigin-difference-tmz-games-photoshop/

British Indian Ocean Territory British Virgin Islands Britney Spears Britney Stevens Britt Morgan