Justin Bieber has made a twitter apology to the paparazzi after his reaction to the photographers on Tuesday after his 17^th birthday bash in Los Angeles.

He and is newly official girlfriend Selena Gomez of Disney fame were surrounded by the photographers after they left his birthday celebrations held in the Maggiano restaurant in LA.

It is reported that the Canadian singing sensation signaled to the assembled paparazzi with his middle finger while his girlfriend Selena protected her face from the flashes of the cameras.

After the event Justin Bieber went online to say sorry for the gesture. He tweeted: “Had a great bday and at the end of the night we got surrounded by papas and I reacted in a way I know better.”

He added: “I'm sorry #killthemwithkindness. It's not always easy but I know better than to react in anger.”

Following the incident it was reported that Selena Gomez had been punched by a Bieber fan after the revelations that the two were an official couple.

A spokesman for Selena Gomez said that no such incident had occurred and that there was “absolutely no truth” to the rumours.

A twitter trend #sorryjustin had people speculating that fans were bust trying to say sorry for another incident with a fan involving Selena Gomez but this has been denied by the star despite some photos of the evening apparently showing Selena with an injury to her lip.