And record-breaking X-Factor superstar Leona Lewis will be releasing the official Sport Relief single.

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I'll be the one trying to get off with Katy Perry and passed out next to Leona Lewis.

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Bennett, who was inspired to join the show after seeing Leona Lewis win last year's series, was called a "class act" by mentor and judge Sharon Osbourne.

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Castaldo added that it did not seem that Leon's song would sell as well as last year's Christmas number one by previous X Factor winner, Leona Lewis.

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Sande had become known for her songwriting - Cher Lloyd, Susan Boyle, Gabrielle, Rihanna, Leona Lewis, Alesha Dixon, Cheryl Cole and Tinie Tempah are among those to have benefitted from her talents - before signing a solo recording deal of her own.

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For anyone who has managed to avoid a television, newspaper, billboard, radio show or conversation for the last four months, the X Factor is one of the biggest TV shows in the UK. In the past, it has produced huge stars such as Leona Lewis and Alexandra Burke.

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