Knowles to star in 'X Factor' finale despite Cowell row

Beyonce Knowles is due to appear on 'The X Factor' this month - casting aside her feud with show guru Simon Cowell.

The 'Crazy In Love' hitmaker will perform on the show's finale on December 13, despite Cowell once claiming she was 'not sexy' and 'not a good singer'.

Knowles' father hit back at the music mogul's comments, saying: "Simon wouldn't know a hit song, image or talent if it hit him in the face."

Yet the show's bosses are expecting the star's performance to smash the viewing figures for Britney Spears' appearance on the program last week - which attracted criticism after she mimed the words to 'Womanizer'.

A show source told The Sun: "Beyonce and Simon can put their differences from years ago to one side. He is way past it.

"Beyonce singing live is something to behold and would just be brilliant."