Superstardom privileges some with a lifestyle so ostentatious it removes them from reality. But these beneficiaries also have a digital megaphone that holds more power than that of world leaders, with millions of admirers hanging on every word, demanding entertainers take a stand on matters of social justice or global catastrophe. Meanwhile the public must still wait for the tell-all interviews or emotionally charged documentaries to access a glimpse of the stars’ private lives. Recent examples featured Taylor Swift, Demi Lovato, or Billie Eilish bearing their crippling insecurities and reckoning with the vices of fame. Advertisement In the engaging and spirited “The Boy from Medellín,” director Matthew Heineman (“Cartel Land,” “City of Ghosts”) frames all these variables in relation to reggaeton maverick J. Balvin over the course of a week in 2019, leading up to his first stadium concert in his hometown just as student protests collapse Colombia.