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James Corden supplies the vocals for Sainsbury's animated "The greatest gift" campaign, which is raising funds for Great Ormond Street Hospital Children's Charity.

His song was written by Bret McKenzie from Flight of the Conchords.

It's been a busy year for Corden. In addition to his US chat show, he's also been clocking up screen time with brands, appearing in ads for Apple and Confused.com, as well as McDonald's crowdsourced Christmas Day ad in 2015.