Justin Bieber cursed out the paparazzi in London Friday morning, just hours after being rushed to the hospital on Thursday night after having a difficult time breathing during a concert at London’s O2 Area.

The 19-year-old superstar got into the altercation when he made contact with a photographer, who apparently didn't like being touched by the singer, reports TMZ.

The photographer then insulted Bieber as he made his way into the waiting SUV, saying [expletive off back to America]", and "[expletive] little moron.”

Bieber evidently heard the rude comments, as he left the SUV and screamed at the photographer, “What the [expletive] you say?” to which the photographer replied, “You heard what I said…you heard what I [expletive] said mate.”

“I’ll [expletive] beat the [expletive] out of you,” Bieber responded as his bodyguards held him back before pushing him back into the SUV.

Following the altercation, Bieber took to Twitter to explain what happened.

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

Bieber then proceeded to say that this will only be fuel for his 2013 Believe Tour. “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.”

Bieber is not the only artist having a tough week. Chris Brown also had an alteration on Wednesday night while in Los Angeles.

Brown still could not keep himself out of trouble, as he later got into an altercation while at PINZ bowling alley in Studio City, Los Angeles.

Brown was there for a charity event, when TMZ reports that the singer got upset when the valet asked for $10 to get Brown's car.  

"[Expletive] ten dollars," Brown can be heard saying in a video, before someone in Brown’s entourage says, "We got the money ... don't worry about it."

Eventually, Brown was given the keys to his car, though it is unclear whether or not he paid the $10 fee.