- 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
- Singer Oliver Tree Has Died Aged 32 Following Helicopter Crash In Brazil Yahoo
- Singer Oliver Tree Is Said to Have Died in Collision of Helicopters in Brazil The New York Times
- Singer Oliver Tree, 32, Among 6 Killed in Fiery Crash Involving Two Helicopters While on World Tour People.com
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