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.

Oliver Tree 's girlfriend is speaking out for the first time since he died in a helicopter crash in Brazil ... and she says folks need to shut up about "any other women that Oliver may have been seein...

He accompanied the post, shared by Page Six before it disappeared, with an image of his friend Tree and producer Lucas Frota, who also died in the crash.