She had just got done performing the most recent show on her Hopeless Fountain Kingdom tour when she was able to meet up with some overseas friends.
Halsey has apparently been a huge fan and friend of the BTS boys for over two years.
The "Eastside" singer says the BTS boys "inspire me so much" and that they are "A+!"
Check out what she tweeted (side note... where's Jin?):
They actually have been friends for a long time.
Check out this video of Halsey surprising the boys with churros last year!