Speaking to ITV News ahead of tonight's switch on in Oxford Street, Jessie J said Christmas helped put London in a good mood - which was what the capital sometimes needed.
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Resham Khan suffered 'life changing' injuries when she had acid thrown at her through the window of her car.
Around 20 households are still in the blocks this morning and are now being told they 'must leave' over fire safety fears
The London grime star called for the Government to be 'held accountable' over the disaster