No, really… what are you doing here? Christina Aguilera took a vacation from her sabbatical by showing up unexpectedly, but gave credence to her public comments about returning for season 5 in the fall.
Usher and Carson Daly reunite from "TRL", and Blackberry comes back to Hollywood with a pitch. Plus: "Twilight" author Stephenie Meyer and the "Game of Thrones" cast celebrate premieres.