'The empire is full of kids': How P.Louise is using children to market 'back to school' make-up products... including lip gloss disguised as a pen. Insiders reveal all to MOLLY CLAYTON - including troubling role of Lacey M, 12

For most children, September marks the beginning of the school year, a time when pupils leave the house with new shoes, sharpened pencils and, perhaps, a little nervousness.

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