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Usher has high-tailed it down to Panama to talk some sense into Justin Bieber ... TMZ has learned.

Justin and his mentor posed for pics with a woman who appears to be a Panamanian Belieber (they really are everywhere).

Sources tell us Usher flew to Panama for a serious come-to-jesus with JB on the heels of his arrest in Miami.

We're told Justin's manager Scooter Braun, and Justin's childhood friend Ryan Butler, are also there for the sit-down. Scooter got roped in for a pic with a Belieber at the resort where they're all staying.

We haven't heard this word used, but this meeting has all the earmarks of an intervention.