UNIVERSAL CITY, CA - JULY 22: (EXCLUSIVE  COVERAGE) Singer Justin Bieber in the audience during the 2012 Teen Choice Awards a
Kevin Mazur/TCA 2012

Justin Bieber turned 19 years old yesterday and celebrated with a big ol' bash last night in London, where's he currently on tour. And while he started the day by receiving birthday wishes from fans and famous friends, he ended it with a depressing tweet: "Worst Birthday," he wrote. Awww. Biebs, what happened!? Apparently a confrontation with club security.

Anticipation for the fiesta were high in Camp Bieber. "Big night ahead," he tweeted before heading to his circus-themed bash at London's Cirque du Soir. His manager Scooter Braun even tweeted, "Spoke to the kid and wished him happy bday. He is gonna go hard tonight..."

But then something went wrong. According to E! News, a "confrontation occurred between Bieber's entourage and club security." Bieber's entire party subsequently left, prompting his depresso tweet. 

Hey, it's your birthday, cry if you want to, dude.

Details on this "confrontation" are still hazy, but for what it's worth, Perez Hilton is reporting that the incident was caused when 14-year-old Jaden Smith was denied entry due to his age (England's legal drinking age is 18). Apparently Bieber didn't want to continue party rockin' without his pal. Smith later tweeted: "I Gave Justin His Cartier Then Went Home." 

What do we learn here: When you're famous you get mad about silly things called "laws."

Cirque Du Soir have since released the following statement: "We, like all clubs in London, operate a strict age policy. As a few of the members of the party were under the suitable age of 18, the security team at Cirque Du Soir, London, clearly explained this rule and refused entry to the club for anyone who could not provide us with adequate proof of age. Justin Bieber visits Cirque Du Soir regularly, and he and his friends are always welcome, as long the members of the group are legally old enough to enter the club. This was simply a matter of regulation that we must adhere to."

We are very sorry, and understand it's his birthday, but our hands are tied with local authorities and rules we need to follow as club to keep our license. We clearly didn't want to give him the 'worst birthday.' He is a friend and previously was always welcomed with open arms."