The Baby hitmaker was one of the first patrons to arrive at The Venue in Angola and asked the members of cover band Bonafide if he could play drums with them.

Group member Heidi Herber says, "He just looked like a normal kid in the bar... We had no idea (he was going to be there)."

After attendees recognised Bieber, police were called to provide extra security, but the night ended without incident.

Herber continues, "It was a social media frenzy (when people realised who he was). The phones started to come out. Social media is extremely powerful."

The surprise appearance came a day after Bieber showed up unannounced at Travis Scott's album listening party in New York on Thursday (03Sep15) to perform the rapper's new song Maria, I'm Drunk.