From late-night to daytime and still as sassy as ever, one of the funniest women alive will be joining Ellen today! CHELSEA HANDLER is here, and lately she's been doing a lot of writing! The comedian, actress, host and author has the ability to cause... (more) a storm of laughter in any medium, from the page to the screen to the stage. Chelsea's new book, "Uganda Be Kidding Me," details the star's travels to Africa, which means all the absurdity, fun and spontaneity everyone loves about her is revisited abroad. Chelsea will give Ellen a live version of her epic adventures! Then, she's one move away from replacing Don Draper on TV's hottest show -- ELISABETH MOSS stops by to celebrate the seventh and final season of "Mad Men"! The actress has portrayed of one of the smartest, most determined and ambitious women on television, and Elisabeth is all that and more. She'll share as many hints as possible about what's in store for Peggy! Running the company? Falling in love? Joining forces with Don once and for all? Ellen will ask Elisabeth about everything! Plus, it's time to hear JASON DERULO "Talk Dirty" to Ellen! One of the most amazing young talents in pop music, Jason will perform his hit #1 hit song from his upcoming album, and once again give our host more of his hot bod! If you liked seeing the singer flash his abs last time, you definitely don't want to miss this! On Thursday, Ellen's talking to the boldest people out there!