Seven score and ten years ago (give or take a week), on Thursday, November 19, 1863, President Abraham Lincoln delivered the Gettysburg Address. To honor the 150th anniversary, bowl-cut documentarian Ken Burns has launched a website with the mission to encourage people to memorize the speech. Sure, the site features fancy people like presidents, cardinals, and rabbis (just like the classic joke, "a president, cardinal, and rabbi walk into a bar; they each recite the Gettysburg Address"), but more important, it features celebs like Uma Thurman, Jimmy Kimmel, Steven Spielberg, and Conan O'Brien. Below, watch Stephen Colbert, Louis C.K., Usher, and Alyssa Milano give the address, and vote for who did it best in the comments. Winner is the next president, probably.