Justin Bieber collapsed after becoming short of breath during a performance at London’s O2 arena on Thursday night, but finished his performance after being given oxygen backstage, Reuters reported.

Melissa Victor, a spokeswoman for the teenage pop idol, said he was being taken to see a doctor after the show.

Scooter Braun, the singer’s manager, told the crowd after Mr. Bieber had left the stage that he “got very light of breath, the whole show he had been complaining.” His statement was posted on YouTube by fans.

Ms. Victor said Mr. Bieber, 19, had not been suffering from any health problems before the show.