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 brand new 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 competition on "American Idol" is getting tough, and this week, one more person had to go. They'll be chatting with Ellen and performing. 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!