Speaking about the latest theme week on Matt Edmondson's F Factor video blog, Burnett told fans to expect "surprises" from this week's performances.
"We've got some surprises that are not your normal sort of X Factor songs," she said. "Some people have absolutely gone and taken such a risk. The ones that I think will really work are the ones that we are not expecting... I'm looking forward to hearing Matt [Cardle's] song."
Speaking about his Guilty Pleasures track, Cardle admitted "It's as cheesy as it gets really."
Meanwhile, Paije Richardson said that his song will be an "old school classic" and 1 Direction revealed that theirs is "upbeat", "child-like" and "very guilty".
Earlier this week, it was revealed that Belle Amie will be singing 'Footloose' and Wagner will be covering 'Relax', while Treyc Cohen is expected to tackle 'Stairway To Heaven'.
The X Factor airs on Saturday at 7.30pm on ITV1.