To add someone, go to Google+ and search someone's email. Once you get on their profile, click 'add to circles' and check off 'Following' and that's it. You'd have to wait for them to follow you back in order to be added to each other's friend's list in the game.
Also to be sure you're following a KKH player, go to their About section & check on the bottom right corner. It should say which apps they are signed in through Google+
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Add me
janalove22@gmail.com
I have no idea how to add someone on Google+, but my email address is beth.norton09@gmail.com
I can follow all of you, my email is hodgelaqueta472@gmail.com
Also to be sure you're following a KKH player, go to their About section & check on the bottom right corner. It should say which apps they are signed in through Google+
Just don't steal my spotlight... my wrath is worse than Willow Pape...