BTS challenges Jimmy Fallon to the ultimate 'Fortnite' dance

After selling out their first U.S. stadium show in minutes back in August, BTS showed Jimmy Fallon just how hot they are right now.

The Korean boy band stole The Tonight Showon Tuesday night, where they dropped by to perform and talk about their casual appearance at the United Nations General Assembly yesterday.

Now that they've finished speaking in front of very important diplomats about their "Love Myself" anti-violence campaign, the band has set their sights on the Grammys.

"We can dream," RM told Fallon in an interview.

BTS are also damn good dancers, battling Fallon on a whole range of dance moves made popular by Fortnite.

While Fallon is no slow mover, he definitely can't keep up with the professionals.

Oh, and what's a BTS appearance without a performance? The band did a rendition of "I'm Fine" and "Idol" to cap off the show.

Some were calling it the band's best TV appearance in the U.S. so far.

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