Demi Lovato, second from left, and Britney Spears are joining L.A. Reid, left, and Simon Cowell as judges on Fox's "The X Factor" this fall.
"Glee," starring Darren Criss, left, and Chris Colfer, will be moving to Thursday nights in the fall.
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Britney Spears and Demi Lovato are joining the judging panel on “The X Factor” this fall, part of Fox’s effort to boost its underperforming music competition shows. The network’s executives also promised changes for “American Idol.” Fox is adding two new comedies and a drama in the fall, pumping new life into “Glee” by moving it to a new night.