Bosses at London's O2 Arena have assured Justin Bieber fans the singer is set to perform as planned on Friday night (08Mar13) following his collapse and hospitalisation on Thursday evening (07Mar13).

The Baby hitmaker fainted backstage during his show at the venue and was given oxygen during a 20-minute break before taking to the stage again to finish the gig.

He was admitted to hospital for tests after the concert and took to his Instagram blog in the early hours of Friday morning to share a snap of himself lying in his hospital bed.

Bieber insisted he was bouncing back after his health scare by declaring, "Gettin (sic) better listening to Janice Joplin (sic)," but fans feared he would be forced to cancel his final gig at the O2 Arena on Friday.

However, venue bosses have now assured devotees that Bieber will complete his four-night residency as planned amid reports he has left the medical facility.

A post on the venue's official page reads, "As things stand Justin Bieber is still set to perform the final night of his shows at The O2 this evening."

O2 Arena spokesperson Jeremy King tells the Associated Press, "He was treated by our team of medics and after further examination they didn't find anything more serious or worrying."

The health drama rounds off a trying week for the singer - his London birthday party last Friday (01Mar13) was marred by a dispute with security staff at a nightclub, and he faced the anger of fans and their parents after taking to the stage at the O2 Arena late on Monday night (04Mar13).