US X Factor news
- One Direction's Niall Horan congratulates Demi Lovato on US X Factor job via Twitter
- Britney Spears unveiled as new US X Factor judge at Fox Upfront event
- New US X Factor judges Britney Spears and Demi Lovato dress up for launch with Simon Cowell
- Simon Cowell's biographer Tom Bower: Cheryl Cole was a total disaster on US X Factor but Simon's real anger was with Will.i.am
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