Oliver Tree, the eccentric singer known for viral hits like “Alien Boy” and “Life Goes On,” has died at the age of 32 following a helicopter crash in Rio de Janeiro.

Officials in Brazil on Monday were inspecting the site of a crash in which six people were killed Sunday, after two helicopters collided midair over a suburb of Rio de Janeiro.

American singer and comedian Oliver Tree was listed as a passenger on one of two helicopters that collided midair and crashed Sunday morning in Brazil, killing all six people aboard, authorities said.