Justin Bieber loses temper and attacks paparazzi in london (VIDEO)

Justin Bieber’s week in London has just gone from bad to worse with Justin launching himself at a photographer and threatening to fight him - and it's all been caught on video.

The latest foul-mouthed tirade has sparked fears that the pressure is becoming too much for Justin and that he could be headed for a meltdown.

The incident occurred when Justin was leaving his London hotel on Friday afternoon and as he dashed after his security through a sea of photogs Justin accidentally bumped one of them before getting into the car.

The photographer who was knocked started complaining to JB’s security (in not very nice language we must say!) so then Justin himself popped out of the car and launched himself at the man yelling, "What the f*%^ did you say? What did you say? I'm gonna f*%^ing beat the f*#$ out of you." All the while Justin’s minders had to hold Justin back and bundle him into the car before driving away. Scroll down to see the video of the events.

Shortly after the incident Justin took to his Twitter account to comment about the drama. Here’s what he said:

@justinbieber: Ahhhhh! Rough morning. Trying to feel better for this show tonight but let the paps get the best of me...

@justinbieber: Sometimes when people r shoving cameras in your face all day and yelling the worst thing possible at u...well I'm human. Rough week

@justinbieber: Not gonna let them get the best of me again. Gonna get focused on this show tonight. Adrenaline is high now. Gonna put it on the stage

@justinbieber: Only way someone can break u is if u let them.

The latest incident comes after a drama-filled 10 days in London for the star, which included a dispute with nightclub bouncers on his birthday and coming under fire from fans for starting his Monday night show late. Justin then collapsed backstage after his Thursday show and was subsequently hospitalised later that night.

Justin has one final London show left at the O2 Arena – and we hope after this leg of the tour he’s going to have a nice well deserved break.

Here’s the notorious video of Justin’s run-in with the London paparazzi. WARNING! The video contains explicit language.