Justin Bieber says he is "getting better," after fainting backstage at a concert in London, and the venue says Friday's show is scheduled to go ahead as planned.
A spokesman for the O2 Arena said the 19-year-old pop star was treated backstage during Thursday's concert after becoming short of breath, but recovered and finished his set.
"As far as we are concerned everything is on, on, on" for Friday's show, Jeremy King said.
"He was treated by our team of medics and after further examination they didn't find anything more serious or worrying."
A spokeswoman for Bieber said he was given oxygen and took a 20-minute reprieve after fainting backstage at the arena on Thursday.
Bieber later posted a shirtless photo of himself in a hospital bed with the caption: "Gettin better listening to Janis Joplin." Before that on Twitter he thanked "everyone pulling me thru tonight."
"Best fans in the world," he wrote. "Figuring out what happened. Thanks for the love."
Jazz Chappell, a 20-year-old concertgoer who brought her younger sister and her friend to the show, said Bieber announced he couldn't breathe and needed water. He resumed performing, but then had to be helped offstage by a backup dancer. In the nearly 30 minutes he was offstage, some fans started to leave. Once his manager announced what had happened, Chappell said many fans in the audience were gasping and crying, while others kept cheering for him to return.
"I thought, 'Give the guy a break. He just fainted. He's not a performing horse. Let him rest a second,'" said Chappell.
In a video of the concert posted online, Bieber's manager, Scooter Braun, appeared onstage and told the crowd that the singer was feeling "very low of breath" but would come back to finish the show.
Chappell said Bieber, who is in London to perform four concerts at the O2, later returned and performed low-energy renditions of his hits "Boyfriend" and "Baby."
Braun later tweeted "everyone please give him a little space and he will be ok. Im sure he appreciates the support ... Tough kid proud night once again he always finishes the show. Full out. True pro..."
The incident caps a difficult week for Bieber. He was forced to apologize to outraged fans who accused him of taking the stage almost two hours late for his first concert at the O2 on Monday. He insisted he was only 40 minutes late and blamed "technical issues." He took to Twitter to vent his frustrations with the media's portrayal of the incident.
AP writers Jill Lawless in London and Derrik J. Lang in Los Angeles and AP Music Writer Mesfin Fekadu contributed to this report.