The X Factor: Battle of the Stars was a UK celebrity special edition of The X Factor, which screened on ITV, started on 29 May 2006 and lasting for eight consecutive nights. Pop Idol was meant to air in its place as Celebrity Pop Idol but was stopped shortly before transmission, when ITV picked The X Factor over it.

Nine celebrity acts participated, singing live in front of the nation and facing the judges of the previous The X Factor series, Simon Cowell, Sharon Osbourne and Louis Walsh. Voting revenues were donated to the celebrities' chosen charities.

It was reported on 26 August 2006 that Cowell had axed the show, describing it as "pointless" and adding "we are never going to do it again."