BTS returns to the World Digital Song Sales chart with "First Love," which hits the top 10 almost a decade after its release. NEW YORK, NEW YORK - FEBRUARY 21: (L-R) J-Hope, SUGA, Jungkook, Jimin, RM, ...

BTS’s 2016 cut “21st Century Girl” climbs to No. 3 on iTunes in America, giving the group a surprise top 10 digital bestseller years after its release. NEW YORK, NEW YORK - FEBRUARY 21: (L-R) Jimin, ...