Justin Bieber collapsed during a concert Thursday night in London.

Teen sensation Justin Bieber passed out on stage from shortness of breath during a performance in London on Thursday night, according to a spokeswoman for the singer.

"[Justin] fainted and took a 20-minute reprieve to the stage and was given oxygen," said Melissa Victor, Justin Bieber's spokeswoman.

The heartthrob, 19, was taken to see a doctor after the show. Representatives for the Justin Bieber assured fans that he is okay.

According to Reuters, Scooter Braun, the Canadian pop star's manager, told the audience that "Justin got very light of breath, the whole show he's been complaining."

Victor also said Justin Bieber ignored doctors orders to finish the show early. Instead the pop star returned to the stage to finish the concert.

"The fans were so supportive and cheering him on and chanting his name," reported concert attendee Lauren Odell to E! News. "He came back on and finished with 'Believe,' 'Boyfriend' and 'Baby,' but struggled with energy."

Thursday night's London show was the third of four at the O2 Arena in the singer's "Believe" world tour.

According to reps, Justin Bieber was not suffering from any health issues before the London concert.

The shortness of breath and subsequent collapse are thought to be the result of over-exertion on the part of the young pop idol.

Justin Bieber fans got on their favorite social media sites to share news and discuss the incident.

On Twitter some fans have started using the hashtag #justintakeabreak.

Concert-goers reportedly gave Justin Bieber a standing ovation at the end of the show.

The pop singer also apologized to fans on Thursday for delays in the start times of his shows earlier in the week, explaining there were some technical difficulties.

Justin Bieber is said to be recovering from the incident well and plans to move forward with the scheduled fourth London concert.