SINGER Justin Bieber will not performing in Singapore on Oct 7 "due to unforeseen circumstances", Unusual Limited said in a Singapore Exchange (SGX) filing on Tuesday.

This comes just after almost three weeks, when Unusual Limited first announced that the Canadian singer will be making a stop here as part of his Purpose World Tour concert.

Leslie Ong, executive director and CEO, Unusual Limited, said: "As promoters of this concert, we share the disappointment with all of Justin's fans on this cancellation. We will work with the ticketing agent to ensure a speedy refund for all tickets purchased."

Unusual Limited, the events production unit of mm2 Asia, had a strong start to its trading debut on the Catalist board of the SGX on April 10. Shares opened at S$0.455 and closed at S$0.435, some 117.5 per cent above its initial public offering price of S$0.20.

Unusual closed trading at S$0.51 on Tuesday, up one Singapore cent, or 2 per cent.