Justin Bieber says he is doing better after collapsing onstage during his concert at London's O2 Arena.

He insisted on finishing his show on Thursday night against doctor's orders.  He was treated backstage before being taken to a local hospital.

The incident happened during "Beauty and the Beat," where he was walking toward the exit when he fell onto the staircase.  Scooter Braun, his manager, went onstage with Bieber's friend Jaden Smith to say that Bieber was getting emergency medical attention.

Later Bieber tweeted that he was "getting better" and thanked his fans for being supportive.