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Miley Cyrus will be among the guests performing on the forthcoming X Factor live finals – but she has reportedly been warned to ‘keep it clean’.

The 20-year-old Disney star turned chart-topper made headlines all over the world during her performance at the VMA Awards last month.

Her onstage antics saw her ‘twerking’ suggestively against Blurred Lines singer Robin Thicke while dressed in skimpy latex underwear.

The performance, which also saw her simulating sexual acts with a foam finger, caused a Twitter storm – but the singer remained unrepentant, saying: “I knew I was making history.”

The X Factor has been forced to rein in some of its racier performers in the past after previous appearances from Christina Aguilera and Rihanna during the 2010 final spawned hundreds of complaints.

Both singers ran into trouble for raunchy antics on stage, with Rihanna stripping down to underwear and fishnets and Christina performing a ‘burlesque’ inspired routine which saw her gyrating with a troupe of dancers in lingerie.

The X Factor live finals will kick off later this autumn, with the second week of auditions set to be screened on ITV on Saturday at 8pm.