Bieber getting better after 02 'collapse'

Pop star Justin Bieber was treated by doctors after suffering breathing problems during his concert at London's O2 Arena last night.

The 19-year-old was performing the third out of four nights at the venue.

The Canadian took a 20-minute rest before returning to the stage to finish the show.

He has since sent this message to his 35 million Twitter followers:

Earlier this week he was criticised for keeping fans waiting after coming on stage late for Monday's performance.