SHONDA RHIMES DID WHAT?! See the New "McDreamy"

Okay. I'm calm. I'm calm. No I'm not. What was Shonda Rhimes thinking?! Say hello, Grey's Anatomy fans - or potentially former Grey's fans after this announcement! The cast is getting a new surgeon on deck - and if you could take Patrick Dempsey and morph him with Billy Ray Cyrus, that's exactly who he…