BTS have returned for a second night as the musical guest on NBC's 'The Tonight Show Starring Jimmy Fallon'!

For this very special musical guest performance of their 'Billboard Hot 100' topping single "Butter", BTS lit up the Seoul cityscape with their "smooth like butter" presence, while dancing on the soon-to-be opened World Cup Bridge in Seoul's Mapo-gu. The brand new bridge, spanning across the Han River, will be opened to the public next month in August!

Watch BTS perform once again on 'The Tonight Show Starring Jimmy Fallon', above!