Britney Spears is joining the judges table on Simon Cowell's "X Factor." She appeared Monday at Fox's presentation about new shows along with Demi Lovato, who also is joining as a judge, plus Mr. Cowell and judge L.A. Reid. (Associated Press)

Britney Spears is joining the judges table on Simon Cowell's "X Factor." She appeared Monday at Fox's presentation about new shows along with Demi Lovato, who also is joining as a judge, plus Mr. Cowell and judge L.A. Reid. (Associated Press)