Justin Bieber faints video: Bieber passes out at London O2 arena during show, taken to hospital

Pop star Justin Bieber is recovering after feeling woozy during his concert at London's O2 arena Thursday night.

The 19-year-old's manager says he had to take a break and got treated with oxygen backstage before finishing the concert.

Afterward, he was taken to a London hospital as a precautionary measure.

On Instagram, Bieber posted a photo of himself shirtless, apparently lounging in a hospital room with a pair of headphones on.

Bieber also took to his official Twitter account to thank fans for sticking with him.

His rep says Bieber was just exhausted from a long week.