Alison Sweeney, Usher & David Guetta

She's the warm and winning host of the hit show "The Biggest Loser." ALISON SWEENEY is here to give Ellen an update on her adorable family. And as the host of "The Biggest Loser," she'll probably have some great tips on how to stay trim during the holidays! Then, it's a worldwide exclusive! USHER and DAVID GUETTA are here to perform their #1 hit, "Without You" from David's CD, "Nothing But the Beat," and the only place you'll see it is right here on Ellen!