The Duchess of Cornwall told Lady Gaga they share one particular thing in common

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The Duchess of Cornwall and Lady Gaga at the Royal Variety Performance on Tuesday. Photo: © Getty Images
The Duchess of Cornwall told the singer her grandchildren call her "Gaga". Photo: © Getty Images
Camilla exuded heaps of glamour in a heavily embellished red lace gown. Photo: © Getty Images
The royal couple were also introduced to Robbie Williams and host David Walliams before the star-studded show, which was held at the iconic Hammersmith Apollo. Photo: © Getty Images
Ahead of the event, David said: "I'm very honoured and excited to be hosting the Royal Variety Performance. I was lucky enough to host back in 2012 so will be looking forward to another fabulous evening with huge talent." Photo: © Getty Images
Sting performed his hit "Every Breath You Take" on the night. Photo: © Getty Images
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