An Amazing Secret About Eight Celebrities!

This might seem quite odd for a posting on my blog, but I promise you, I do have a fun connection to the photos below. I'll share the answers to these questions next Monday:

1. Who are the people pictured in the photos below? 
2. What do they ALL have in common? 

I have a few Facebook friends that do know the answer to these questions and I ask them to please hold off on revealing the amazing secret. Thanks!

Can you identify these faces?