7. January Jones
"Be careful around January. She's not as approachable as the others... Everyone else is so nice." - Jared Gilmore on his Mad Men co-star January Jones.
By now, actress January Jones has developed a solid reputation for not being the kindest of celebrities. Jared Gilmore's words were echoed by a perturbed Zach Galifianakis. The Hangover actor was not amused when asked for his thoughts regarding Jones' quote where she called him "one of the funniest men in town." "That's really funny," he replied in a interview, "because, if I remember correctly, she and I were very rude to each other." Galifianakis went on to relate a story how Jones called him over at a party for a ten minute talk before asking him to leave. Zach was quick to put Jones in her place by calling her a television actress everyone would soon forget.