Members of the crowd sporting "bald caps" gather in the sunshine ahead of a concert by US rapper and singer Pitbull in Hyde Park, London, on July 10, 2026. Ahead of the performance an official GUINNESS WORLD RECORDS title attempt for the 'largest gathering of people wearing bald caps' will be held. (Photo by CARLOS JASSO / AFP via Getty Images)

Members of the crowd sporting "bald caps" in the sunshine gather ahead of a concert by US rapper and singer Pitbull in Hyde Park, London, on July 10, 2026. Ahead of the performance an official GUINNESS WORLD RECORDS title attempt for the 'largest gathering of people wearing bald caps' will be held. (Photo by CARLOS JASSO / AFP via Getty Images)

Members of the crowd sporting "bald caps" in the sunshine ahead of a concert by US rapper and singer Pitbull in Hyde Park, London, on July 10, 2026. Ahead of the performance an official GUINNESS WORLD RECORDS title attempt for the 'largest gathering of people wearing bald caps' will be held. (Photo by CARLOS JASSO / AFP via Getty Images)

Members of the crowd sporting "bald caps" in the sunshine gather ahead of a concert by US rapper and singer Pitbull in Hyde Park, London, on July 10, 2026. Ahead of the performance an official GUINNESS WORLD RECORDS title attempt for the 'largest gathering of people wearing bald caps' will be held. (Photo by CARLOS JASSO / AFP via Getty Images)

Members of the crowd sporting "bald caps" gather in the sunshine ahead of a concert by US rapper and singer Pitbull in Hyde Park, London, on July 10, 2026. Ahead of the performance an official GUINNESS WORLD RECORDS title attempt for the 'largest gathering of people wearing bald caps' will be held. (Photo by CARLOS JASSO / AFP via Getty Images)

Members of the crowd sporting "bald caps" gather in the sunshine ahead of a concert by US rapper and singer Pitbull in Hyde Park, London, on July 10, 2026. Ahead of the performance an official GUINNESS WORLD RECORDS title attempt for the 'largest gathering of people wearing bald caps' will be held. (Photo by CARLOS JASSO / AFP via Getty Images)

Members of the crowd sporting "bald caps" in the sunshine ahead of a concert by US rapper and singer Pitbull in Hyde Park, London, on July 10, 2026. Ahead of the performance an official GUINNESS WORLD RECORDS title attempt for the 'largest gathering of people wearing bald caps' will be held. (Photo by CARLOS JASSO / AFP via Getty Images)

Members of the crowd sporting "bald caps" in the sunshine enjoy some refreshments ahead of a concert by US rapper and singer Pitbull in Hyde Park, London, on July 10, 2026. Ahead of the performance an official GUINNESS WORLD RECORDS title attempt for the 'largest gathering of people wearing bald caps' will be held. (Photo by CARLOS JASSO / AFP via Getty Images)