Date: Oct. 14, 2010

Chelsea Handler has no filter when it comes to calling out celebs. Once she caught wind of Nick Cannon heading out on a comedy tour, she tweeted: "I just heard nick cannon is starting a comedy tour. Who's going to do the comedy?" The two engaged in a war of tweets, then Handler resorted to stereotyping Cannon by sending an image of a grape soda can with the message "@nickcannon pls drink this before you tweet me again." #Tasteless