Why was Britney Spears pulling faces on ‘The X Factor’?

Judging by the faces she was making, Britney Spears didn't seem very impressed on last night's X Factor.

Judging by the faces she was making, Britney Spears didn’t seem very impressed on last night’s X Factor. 
The judge’s act Carly Rose Sonenclar was the last contestant to make it into ‘The X Factor’ USA finals, leaving her with a tense wait for the announcement. 
Dressed in a plunging dress with sheer panels, the singer’s grimace soon turned into a smile when the news was announced. 
Meanwhile, Simon Cowell celebrated as his group Fifth Harmony reached the final but quickly lost his smile as his other group Emblem 3 were axed from the competition. 




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