It isn't just a fantasy anymore: now it's all for real! Super pop diva Mariah Carey has just officially signed on as an American Idol judge for the show's upcoming 12th season. "I'm so excited to be joining Idol", Mariah told just seconds after the news was shared with. "I wish I could have been there myself to tell you. I can't wait to get started in a couple of months." Steven Tyler and Jennifer Lopez are according to close sources "100 percent" done with their Idol runs, and now it looks like it's all about Mariah! We're so curious who else will join in, and of course... What will she make doing this??? (tvline)