Disney star Demi Lovato has reportedly been signed as a judge on 'The X Factor' U.S.A. To know more on this latest news, check out the video. Regular Facebook Updates http://www.facebook.com/RajshriDotCom. Twitter Updates https://twitter.com/#!/RajshriDotCom. Watch more http://www.youtube.com/HollywoodNOW for the latest Hollywood News