Justin Bieber has been dealt a further blow during his beleaguered trip to the U.K. after it emerged a number of fans were duped into buying fake tickets to meet the pop star at his London shows.

The Baby hitmaker is currently playing a four-night residency at London's O2 Arena, but the tour has been overshadowed by controversy after he showed up late for the first concert, infuriating parents who had to take their young children home before the star appeared on stage.

A number of parents have now spoken out to claim they paid hundreds for backstage packages so their kids could meet the singer at the London shows, only to find they had been duped by a scam.

Sue Adams, 45, from Kent, England paid $1,700 (£850) for passes for her two young daughters, but the website which sold the packages never followed through with the promise.

She tells the London Evening Standard, "We paid in full right away. A week later we got a receipt in the post and were told the tickets would arrive about eight weeks before the concert. They never came. We have been conned... My daughters were just distraught. They had been counting down the days to see Justin and suddenly it hasn't happened."

Sally Kirby, 45, who also fell victim to the scam, insists the parents are taking their case to the authorities, adding, "We are going to the police. This is a scam and other people should be warned."