TV
WENN
According to The Mirror, the star will be the first major act to appear on this year's show and will also mentor the finalists for one week on the programme.
A source said about the alleged booking: "Simon Cowell is cock-a-hoop."
Houston is expected to perform a song from her long-awaited comeback album.
Other stars tipped to appear on this year's show include Madonna, Robbie Williams, Rihanna and Shakira.
The X Factor returns this Saturday at 7pm on ITV1.
Tube Talk
'Skins': The most violent episode ever?Tube Talk previews this week's violent episode of the E4 drama Skins.
TV Interviews
'Celebrity Apprentice' Debbie Gibson Q&ADebbie Gibson opens up about her Celebrity Apprentice experience.
Reality Bites
Does Simon Cowell have new SuBo?: VideoWatch a clip of Jonathan Antoine, who is tipped for success on BGT.
TV Ratings
Judi Dench draws 4.1m on 'Graham Norton'ITV1 pips BBC One to the highest primetime audience share.
