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5 December 2011, 08:06
The reality show judge treated viewers to a medley of songs including current single 'Down For Whatever'.
Kelly Rowland and Justin Bieber both featured as guest artists on The X Factor last night (4th December) for the semi-final of the current series.
Panellist Kelly stepped onto the stage during the results show to perform a medley of her most popular hits, including recent single 'Down For Whatever' and her David Guetta collaboration 'When Loves Takes Over'.
The 'Commander' singer was joined on stage by shirtless male dancers while Kelly herself donned a glittery black top and hot pants for performance.
Canadian singer Justin took to The X Factor stage in a bright red jacket to give audiences a rendition of his festive hit 'Mistletoe', taken from the 17 year-old's Christmas album 'Under The Mistletoe'.
Last week the 'Baby' singer unveiled the music video for his duet with Mariah Carey, which sees the two giving a reworking of her yuletide classic 'All I Want For Christmas Is You'.
Watch Kelly Rowland's performance on The X Factor below:
Watch Justin Bieber's return to The X Factor this weekend below: