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Sir Paul McCartney gave children from Great Ormond Street Hospital a wonderful Christmas treat when he made a surprise appearance at the London hospital's annual Christmas party.
He chatted and joked with some of the 1500 children and their families in Coram's Fields, London, which was decked out with snow, elves and reindeer.
And the former Beatle delighted onlookers by joining a couple of the youngsters in a festive karaoke session - belting out S Club 7 hit Don't Stop Movin'.
