Mariah Carey has quit "American Idol"

The 43-year-old singer has confirmed she will leave the show after just one season in order to undertake a world tour following the success of her latest single 'Beautiful'.
Mariah retweeted a message from her PR representatives which read: “W/ global success of “#Beautiful” (#1 in 30+ countries so far) @MariahCarey confirms world tour & says goodbye 2 Idol http://mariahcarey.com (sic).”
Along with the tour, Mariah has a number of other projects this year.
Her representative told People magazine: "The rest of this year is jam-packed with Mariah putting the finishing touches on her much anticipated forthcoming album, headlining the Macy's 4th of July Fireworks Spectacular and appearing in Lee Daniels's 'The Butler', opening in August.”
Mariah is the second judge to confirm their departure from the 'American Idol' panel after Randy Jackson, who was the only original judge remaining on the show recently revealed he made the decision not to return next season because he wants to focus on his other interests.
He said: "Yo! Yo! Yo! To put all of the speculation to the rest, after 12 years of judging on American Idol I have decided it is time to leave after this season," he says. "I am very proud of how we forever changed television and the music industry. It's been a life changing opportunity but I am looking forward to focusing on my company Dream Merchant 21 and other business ventures."
It is unclear if Nicki Minaj and Keith Urban will return.