OMG

It's like 1.125 cm on my computer screen, so I'm not sure.
 
It's fake. The real one has been around for years and it ain't that big.
 
Fake. Original can be found here:
Male Celebrity Zone

specifically:
http://25.media.tumblr.com/tumblr_llcd32K7D31qid19fo1_500.jpg

So yes, that guy definitely has something to show off. Why the internet feels the need to inflate already big guys to cartoonish proportions, and why people think it's real, I'll never understand.
Even that one is 'shopped, though I think more for sharpening and clarifying the black cock agains the shadowy background. But it still has been manipulated.