The 2026 iHeart Radio Music Festival concluded its first day with a high-energy set from K-pop supergroup BTS, featuring performances of their hits from their latest album “Arirang.” Korean superstars Jin, Suga, RM, J-Hope, Jimin, V and Jungkook took the stage at T-Mobile Arena in Las Vegas on Friday, Sept. 18, (Sept. 19 in the