It's been a big day for talent competition judges. Mariah is in and J-Lo is officially out at "American Idol," while Britney Spears and Demi Lovato took to satellite to talk to journalists at the press tour about their stint as the new judges on Fox's "The X Factor." Joined by their counterparts Simon Cowell and L.A. Reid, the cozy foursome joked around like best buddies. Like best buddies, this left plenty of room for ribbing. "Britney… is a really good judge. Demi is a brat, but there's something really likable about her as well," said Cowell with a grin. "The show needed someone younger, because I'm in my 30s."