During this week’s X Factor semi finals, each act will sing a Michael Jackson song, his sister Janet will also be appearing on the show.

Before his death, Simon Cowell had hoped that Michael himself would be able to appear on the show, however Janet will now give a tribute performance and offer her thoughts on the Saturday night performances.

An insider said: “The Michael Jackson numbers will be huge crowd pleasers – and each contestant will want to do Janet and the Jackson family proud.”

The semi-finalists will also get to sing a song of their own choice.