A Celebrity Tweet-a-thon for Haiti. 140+ performers. One Tweet each. One Stage. One night only. Witness Ben Stiller, Will Ferrell, Sarah Silverman, Ashton Kutcher, Demi Moore, Rainn Wilson, Sasha Grey, “Weird Al” Yankovic and so many other funny performers as they take the stage at The UCB Theatre in Los Angeles to read one of their signature Tweets.