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25 November 2011, 10:11
The 'Gotta Be You' singers say they were moved after a hospice visit to promote their new charity release.
One Direction say getting the opportunity to feature on the new charity single for The X Factor this year has been "brilliant".
The former contestants contributed to the show's 2010 charity single 'Heroes' and say they were pleased to be asked back to sing on 'Wishing On A Star' with both JLS and the current crop of hopefuls.
"Simon wants to raise as much money as possible and we are right behind him," One Direction told The Sun this week. "It's brilliant to be part of it.
"We were pleased to sing on the new charity single – it gives us a chance to show our support and it will help the kids to have fulfilling lives."
The 'Gotta Be You' singers also revealed they made a visit to the Rainbows Children's Hospice in October which helped fuel their passion for the cause.
"Making them smile gives you and them a fantastic feeling," they added. "You come away feeling you might have made a difference."
One Direction released their debut album 'Up All Night' earlier this week and took to Twitter yesterday (24th November) to thank their fans for supporting the record.
This year's X Factor charity single is a cover of Rose Royce's 'Wishing On A Star' and will be released on 27th November with all profits going to children's charity Together For Short Lives.