Jon Hamm
Jon Hamm was supposed to be America's Sweetheart, right? Not to Kathy Griffin! The comedian herself has had some failures as a human in the public eye, but that doesn't mean she can't out other celebrities for theirs.
You're Old
Apparently, Hamm and Griffin were at the same party one night. The two crossed paths and Hamm had asked Griffin why she was there before telling her that her, "Emmy isn't a real Emmy." Later, he interrupted a conversation with her and Jack Nicholson to call her old. What's eatin' you, Hamm?