The 22-year-old singer played five songs, including The Beatles' "Let it Be" and his own hit "Sorry". His fans also joined him in the middle of the track, reported AceShowbiz.
The crowd cheered for Bieber during his impromptu performance.
Pub owner Oliver Geddes said the Canadian singer was gracious to both staff and customers at the entertainment district bar.
Bieber's performance came after he walked off stage during his concert in Manchester back in October.
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