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The X Factor winner is just one of many stars to feature on the track, which will be released as early as next week.
The likes of Take That, Alexandra Burke, JLS, Cheryl Cole and Mariah Carey have all agreed to help out and there are also plenty of others lined up including Rod Stewart, Susan Boyle and Mika.
Meanwhile, before Leona made her trip stateside we caught up with the Bleeding Love singer leaving Radio One’s Live Lounge.
She had just performed her upcoming single I Got You and a cover of the Oasis classic Stop Crying Your Heart Out.
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<3 Leonaaa she is AMAZING!! x
She is sooooo HOOOOTTTTTT
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