Justin Bieber battled breathing troubles at final London show

JUSTIN BIEBER battled through breathing difficulties to complete his headline-hitting residency at London's O2 Arena on Friday night (08Mar13), just hours after a nasty bust-up with a photographer.

The pop superstar fainted backstage during his show at the venue on Thursday (07Mar13), and was subsequently hospitalized, but doctors deemed him well enough to perform again on Friday.

He hit headlines again just hours before his final concert when he became involved in a furious altercation with a snapper waiting outside his hotel, but Bieber shrugged off the incident and took to the stage as planned to round out his residency in the U.K. capital.

Bieber took to his Twitter.com page after the gig to reveal he has "enjoyed" his time in London, despite his headline-grabbing antics.

In a series of posts, he writes, "Still a little short of breathe (sic) tonight but was an incredible show. London fans go hard! 4 sold out O2 shows in a row!! Blessed.

"Too many blessings to allow the stress in. The press made things look nuts but really I have enjoyed London. The fans are incredible... so while I have seen some crazy stuff it is all smiles. I'm gonna get some rest and keep doing what I love. Entertain all of u (sic). Thanks."

It has been a tumultuous trip for Bieber, as he endured a dispute with nightclub bouncers on his birthday last week (01Mar13) and came under fire from fans for delaying the start of his first night at the O2 Arena on Monday (04Mar13).

However, Bieber's preacher friend Judah Smith reveals the star is seeking solace in religion.

He tells Britain's The Sun newspaper, "He feels under pressure. Every eyeball is on your life. I wouldn't wish it on my worst enemy. This is the first challenge he's had in life, but it won't be the last. I give Justin encouragement. Take time to say to God, 'I'm over my head here. I need your help'. He has coping methods like turning and talking to God and practising the ancient scriptures. We exchange scriptures every day. Justin asks, 'God if you're there, I need help. I don't know what decision to make'."