Mariah Carey has reportedly cancelled a performance on Strictly Come Dancing this weekend but has already pre-recorded her song for The X Factor.

A BBC spokesman said: “We had hoped to have Mariah Carey on the show but her schedule changed and made it impossible.”

However, The Daily Mail reports that Mariah actually pulled out because Simon Cowell insisted that she could only appear on one of the shows.

A source told the newspaper that BBC executives felt that Carey had been “completely unprofessional”in cancelling at the last minute and were forced to line up The Jersey Boys instad..