After the last time JENNIFER LOPEZ was here, Ellen might need to start padding the set! We'll see if she trips when she visits today to talk about her movie, "The Back-Up Plan." She's also focusing a lot on being a mother -- her twins are already two! Then, for the first time ever, the incredible NORAH JONES is stopping by. She's performing a song from her latest CD, "The Fall." Also, the very cute TIM URBAN was a fan favorite on "American Idol," but was eventually voted off. He'll be here today to chat with Ellen and perform. Then, Ellen is always looking for the next best game, and she may have found it! Today she's introducing a hilarious new game that might be the most fun -- and most complicated -- ever!