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.

Two helicopters collided over Rio de Janeiro on Sunday morning and crashed in the city’s western zone, killing all six people aboard, firefighters said.

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