According to TMZ, Justin felt woozy during his performance at the O2 arena and with four songs to go, he went backstage and collapsed.
Justin was then reportedly taken into a private room and given oxygen by emergency personnel. Bieber was advised to go to the hospital but declined because he wanted to finish the show for his fans.
Scooter Braun went on stage to tell fans about Justin.
"Justin's got very light breath. The whole show he's been complaining, He's backstage with the EMTs and the doctor," he said.
Awesomely, Justin came back on stage and completed the show! Fans went nuts!
The Biebs went to the hospital after his show and even found time to Instagram a pic of himself.
He seems to be feeling a little better to us! Get well JB!
Watch Scooter come to the rescue in the video below!