While the 18-year-old is currently touring in Japan, he handed over his social media account to Thair Orfahli, a Syrian refugee traveling to Italy on a boat with 234 other migrants.
This Twitter takeover is part of a United Nations project called #ShareHumanity which aims to tell the narratives of individuals making such a journey.
So that explains it!
When Thair began posting, he tells Simpson's millions of followers how war-torn and dangerous his native country is:
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