Jonathan, we did our own modification for FancyBox to make it work under recent versions of jQuery, and it worked in our tests.

But htere’s something I see on your site:

Error: TypeError: document.getElementById(…) is null
Source: http://celebrityconnected.net/wp-content/themes/celebrityconnected/js/instafeed.js
Line: 2

Are you deregistering the jquery version shipping with WP?