Rapper Pitbull and his fans set a Guinness World Record at BST Hyde Park in London by creating the largest gathering of people wearing bald caps. Multiple outlets report that the event takes place ahead of Pitbull’s headline performance. BBC, The Evening Standard and The Guardian say Guinness counts 22,141 attendees wearing the caps. The reports describe the caps as tight, plastic coverings worn along with Pitbull-themed attire, including a white shirt, black tie and aviator sunglasses, with the crowd dressing in a coordinated way to match the record attempt. The Evening Standard and The Guardian say Pitbull, 45, is formally recognised for the achievement alongside the fans. The Guardian also reports that Pitbull accepts the award at the venue in an all-black suit and makes comments after being informed of the record. Belfast Telegraph publishes the same record recognition headline but provides no additional details in the provided text. All accounts present the record as tied to Pitbull’s BST headline slot and a crowd-participation Guinness World Record attempt involving bald caps.