Stars sign on to honor DeGeneres

Stars sign on to honor DeGeneresJimmy Kimmel, Kristin Chenoweth, Steve Harvey and Lily Tomlin have signed on to honor Ellen DeGeneres with tribute performances as she wins the nation's top humor prize, The Associated Press reports. The Kennedy Center in Washington is awarding DeGeneres the Mark Twain Prize for American Humor on Oct. 22. The show will be broadcast on PBS stations Oct. 30. The lineup also includes John Krasinski, Sean Hayes and Jason Mraz.