The 21-year-old Canadian singer was vacationing in Bora Bora with his friend Floyd Mayweather, Jr when he unexpectedly treated the audience with a gig, reported Aceshowbiz.
In the video, made during the evening, Bieber is seen starting the impromptu set with his latest hit "What Do You Mean?" while Mayweather claps his hands to the beat.
The "Baby" hitmaker is all set to release his comeback album, which he recently revealed would be titled "Purpose".
The LP is a follow-up to 2012's "Believe" and features "What Do You Mean?" as the lead single.