BTS and Adele are the only artists to have topped the iTunes charts in more than 100 countries.
BTS and Adele are the only artists to have topped the iTunes charts in more than 100 countries.
Goodbye, not 'Hello': BTS steals world record from Adele by topping iTunes charts in 103 countries
The K-pop group's latest release, 'Black Swan', has achieved something no other song has
