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.

Police said that American singer and comedian Oliver Tree was on the list of passengers handed to aviation authorities, but have not been able to identify the bodies of those killed in the crash.