It wasn't too easy, I had to sift through several pages of photos of Queen Elizabeth. I originally went to Snopes.com, but they had nothing on it. It may too new for them to have an entry. But evidently whoever added that caption to the Photoshopped image either actually believes the photo is real, or wants to convince others that it is.
If it is new, I'll probably be getting it in an email any day now from one of my angry relatives.
Great find, orlok!