The alt-pop US musician and internet personality Oliver Tree was among six people who died when the helicopter he was travelling in collided with another in Brazil. The 32-year-old had been on a world tour when the crash occurred over Rio de Janeiro on Sunday. One of the helicopters then fell onto the car park of a dealership, setting around 20 vehicles ablaze. Footage published by Brazilian media shows one of the helicopters dropping from the sky, as well as flames and thick smoke rising from