Justin Bieber leaves London's BLC (The British Luxury Club) after celebrating his 19th birthday with friends. Craig Harris/WENN.com Bieber, booed for lateness, says sorry Justin Bieber talks bday fiasco Bieber strips off on bday

Singer Justin Bieber had his 19th birthday celebrations ruined by an alleged night-club bust-up on Friday night.

The Canadian heartthrob, who is currently touring the U.K., held a circus-themed bash at London's Cirque du Soir to mark his big day, and invited his rumoured new girlfriend, British singer Ella-Paige Roberts Clarke.

But just hours after excitedly tweeting about his "big night ahead", the Baby hitmaker took to his Twitter.com page and branded it his "worst birthday" ever.

Bieber did not expand on the dejected post but sources tell Eonline.com his evening took a turn for the worse after a confrontation between Bieber's entourage and club security, which resulted in the pop sensation and his entire party making an early exit after just a few minutes inside the venue.

Bieber and his pals, including Will Smith's son Jayden Smith, are said to have stopped off at a McDonald's before then returning to The Langham hotel.

Worst birthday — Justin Bieber (@justinbieber) March 2, 2013

Meanwhile, Bieber's pal Lil Twist celebrated his friend's 19th birthday with a traffic ticket - from behind the wheel of the pop star's luxury sports car.

The rapper, real name Christopher Lynn Moore, was pulled over on the 101 Freeway by California highway patrol officers, who caught him making an unsafe lane change in Bieber's Fisker Karma on Friday.

TMZ.com reports Twist got away with a ticket for improper driving, but the cops cited him for Bieber's illegally tinted windows.

The car has been nothing but trouble for Bieber since he was handed the keys for his 18th birthday a year ago - the singer was booked for speeding on the 101 Freeway as he attempted to race away from the paparazzi last year and Twist got a ticket in January when he was behind the wheel.