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Should you always stand up to greet someone? Etiquette expert settles the debate after Zendaya's 'basic manners' blunder with Brigitte Macron
She is every Hollywood PR's dream client. Box office successes, effortless style, not to mention her power couple union with Tom Holland. Wherever Zendaya goes, the cameras follow. But for the first time this week, the cracks in her glittering…