Colombian reggaeton singer J Balvin prepares for his 2019 homecoming concert amid intense political turmoil, in Matthew Heineman's latest documentary.Colombian reggaeton singer J Balvin prepares for his 2019 homecoming concert amid intense political turmoil, in Matthew Heineman's latest documentary.Colombian reggaeton singer J Balvin prepares for his 2019 homecoming concert amid intense political turmoil, in Matthew Heineman's latest documentary.