- U.S. singer Oliver Tree among six killed in helicopter crash in Brazil The Washington Post
- American singer Oliver Tree listed aboard helicopter involved in fatal midair collision in Brazil CNN
- Six people killed as helicopters collide over Brazil’s Rio de Janeiro Al Jazeera
- Oliver Tree Said Family Won’t ‘Get a Penny’ When He Dies Complex
- Oliver Tree, “Life Goes On” and “Miss You” Singer, Dies in Helicopter Crash at 32 The Hollywood Reporter
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U.S. singer Oliver Tree among six killed in helicopter crash in Brazil – The Washington Post
