Justin Bieber Video Shows Singer 'Struggling'

Justin Bieber is planning to perform at London's O2 Arena tonight despite feeling "under the weather" after becoming unwell during last night's concert.

The Canadian pop star, 19, left the stage midway through a song after suffering from shortness of breath.

Some reports said the singer collapsed on stage but new video that has emerged suggests he stopped singing, put his hand to his face, and stooped forward looking tired.

He took a 20-minute break backstage where he reportedly fainted and was given oxygen by doctors. He then completed his set and was later taken to hospital.

Bieber has now been released and is expected to finish the last of four concerts at the O2 this evening.

A spokesman said: "Justin has been released from the hospital after a check-up and while he's feeling a little under the weather, he's planning on going ahead with tonight's show."

Prithvi Pandya, who filmed the video of Bieber, said: "When he started Beauty And A Beat you could see he was struggling.

"He took lots of drinks of water, that seemed unusual, and he was really sweaty, sweating a hell of a lot.

"Toward the end of it, he went backstage. We didn't see him fainting. They brought on dancers to entertain, and I knew something was wrong at that point."

Bieber messaged his 35 million Twitter followers overnight that he was "getting better", adding: "Thanks for everyone pulling me thru tonight. best fans in the world. figuring out what happened. thanks for the love."

He also posted a photograph on web service Instagram of him lying shirtless on a hospital bed, wearing earphones and smiling.

In a video posted by a fan on YouTube, Bieber's manager Scooter Braun told the audience: "Justin got very light of breath, the whole show he's been complaining. He's backstage with the EMTs (paramedics) and the doctor.

"They're telling him they want him to go and see somebody and find out what's going on with his lungs, he's just told me that in five minutes, if it's okay with you guys, he's going to come out and finish the show.

"So he might not be jumping around as much and everything else, you guys need to be patient with us, we're not trying to be disrespectful, we're not trying to get you guys home late, we're truly trying to put on a show for the people who love him."

A spokeswoman for the singer later said he had ignored doctors orders to rest and insisted on finishing the concert.

He had not been suffering from any health complaints before the show, she added.

It was not the first time Bieber has collapsed on stage. He suffered concussion during a concert in Paris last June after falling into a glass wall.

Some fans have been asking whether the stage collapse at the O2 was calculated to win back their affection after he was slammed for a late appearance earlier in the week.

One tweeted: "Justin Bieber was not sick, it's a publicity stunt to make up for his late show."

He turned up as much as two hours late for the first concert - although the star tweeted hours later that he had only been delayed by 40 minutes and blamed "technical issues".

The singer, known for his high-energy stage dancing, has been pictured making the most of London's nightlife since he arrived in the capital last week.

After completing the London leg of his world tour, he is due to travel to Lisbon, Portugal, for two gigs on March 11 and 12.