The Hollywood Reporter's newest "Person of Interest" is a hugely popular 25-year-old Canadian-born K-pop star who is finally starting to feel his age. "I'm kind of old now," he laments.

Speaking with K-pop star Mark Lee, known simply by his stage name Mark, it's easy to forget that he's only 25 years old. The Canadian-born rapper, a member of the mega-group NCT (and its sub-units ...