Oliver Tree, the California-born singer-songwriter and rapper known for tracks like "Life Goes On," "When I'm Down" and "Miss You," died in a helicopter crash in Rio de Janeiro, according to CNN Brazil.

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.

Hours earlier, the singer updated his more than three and a half million Instagram followers with a video montage of a joyful day he spent playing football and exploring the country.