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28 November 2011, 08:10 | Updated: 28 November 2011, 12:48
The two former reality show boy bands made a special guest appearance during this weekend's ITV1 results show.
One Direction and JLS joined this year's finalists on The X Factor for a performance of their new charity single last night (27th November).
The show's 15 finalists took to the stage on Sunday's results show to sing their cover of Rose Royce's 'Wishing On A Star'.
For the song's grand finale both One Direction and JLS emerged on the stage to huge applause from the show's live studio audience.
JLS finished as runner-ups on The X Factor back in 2008 while five-piece boy band One Direction came third on the 2010 series.
Last week the groups both filmed appearances in the music video for 'Wishing On A Star', which premiered on Friday night (25th November).
One Direction's debut album 'Up All Night' entered the UK Album Chart in second place this weekend just behind Rihanna's sixth release 'Talk That Talk'.
The X Factor finalists' cover of 'Wishing On A Star' was officially released yesterday and all proceeds from the single will be donated to children's charity Together For Short Lives.
Watch One Direction and JLS performing with The X Factor finalists below: