Crowd of over 22,000 people – and the musician himself – formed the ‘largest gathering of people wearing bald caps’ A tight plastic cap is not an attractive option for protective headwear in 30C heat. Yet 22,141 people opted for just that – along with a white shirt, black tie and aviator sunglasses – in Hyde Park, London, on Friday afternoon. It was both a homage to the rapper Pitbull, the night’s headliner at the BST festival, and part of setting a Guinness World Record for the “largest gatheri