Mariah Carey has signed up to appear on The X Factor next month.
The diva will sing her new track I Stay In Love on the November 8 show.
An X Factor source said: "Simon loves Mariah - he's always comparing acts to her. And finally all the compliments have paid off. It's amazing to have such a big name singing on a British talent show."
And thrilled ITV bosses are expecting ratings to go through the roof. Our source added: "Mariah is one of the most successful female artists of all time. It's going to blow Strictly Come Dancing out the water."
Will Young is next week's guest as the nine remaining acts sing disco tracks.
^ "and *you* out of all people replying about the flop and lip-syncing matters.
