Justin Bieber goes shirtless and pantless as he celebrates his 19th birthday with Ella-Paige Roberts-Clarke

Justin Bieber ended his birthday like most other 19-year-olds – with a trip to the kebab shop.

It was an eventful night for Justin Bieber, with him only kicking off the celebrations at 3 a.m. when he arrived back at his London hotel after performing his gig in Birmingham on Thursday night – before partying up a storm with rumored girlfriend Ella-Paige Roberts-Clarke and a bevy of beauties.

In spite of the freezing winter weather gripping London, Justin Bieber somewhat bizarrely chose to go shirtless as he arrived at his hotel, with a pair of low-slung trousers barely even covering his bottom as he prepared to get ready for his night on the town.

Bracing himself against the London chill, Justin Bieber was clearly keen to show ex-girlfriend Selena Gomez exactly what she’s missing as he was ushered into the hotel with his entire torso on show.

Although Justin Bieber no doubt assumed he looked cool as a cucumber in his hip-hop style trousers, the youngster looked mildly ridiculous with his bright white boxer shorts on display for all to see.

But it was a quick turnaround for Justin Bieber, who seemed keen to get out and celebrate his birthday in style with his newly-acquired posse of female friends.

Writing on his Twitter page before his Birmingham gig, Justin Beber said: “gonna chill and get ready for this show. last show as an 18 year old.”

Before later adding: “Great show!!! Now gonna go celebrate 19!! Thanks.”

The teen hunk managed to locate some clothes for his night of partying in the form of a cream knitted cardigan, a simple black vest and yet again, his favorite low-slung trousers as he headed out supported by an army of minders.

Despite it being the middle of the night, Justin Bieber shielded his eyes with a pair of dark shades and wore a baseball cap as he was ushered into members-only after-hours club, BLC, by his minders.

Justin Bieber’s new leading lady, Ella-Paige Roberts-Clarke, was of course on hand to help him toast his 19th birthday, and was spotted arriving at the nightclub in a pair of form-fitting skinny jeans, a leather biker jacket and a simple white vest, while a coy smile spread across her face.

But the aspiring British singer was by no means the only girl helping Justin Bieber celebrate his special day, with a harem of other ladies also seen joining the group for their night of fun.

After a couple of hours of partying, hunger pangs evidently called, and the gang departed BLC at 5 a.m. before heading to London’s Edgware Road, where they munched on kebabs in a Lebanese restaurant until 6 a.m.

Justin Bieber seemed to come across a little camera shy after his big night out, covering up his face with his top as he left the late-night eatery alongside Ella-Paige Roberts-Clarke and his chums.

Keen to make the most of his special day, Justin Bieber arrived back at his central London hotel at 6.30am for a couple of hours of shut-eye.

On Friday night, the teen idol plans to continue the celebrations with a circus-themed party.

Justin Bieber has arranged a big bash in London, which will feature clowns and a ringmaster.

The star and 20 friends have a £10,000 ($15,000) budget for the night and had been scoping out the perfect venue over the past few weeks.

A source told Britain’s Daily Mirror newspaper: “Justin wants to celebrate in style and he loves clubbing in London. It’s no accident that there’s a break in his UK tour which coincides with his birthday.

“He’s been looking for the perfect venue and finally settled on Cirque Du Soir as he loves the kitsch theme. The venue is all ready for him, with clowns, goblins, aerial acts and some fire-eaters.”

Last year, Justin Bieber celebrated his 18th birthday by being given a $100,000 Fisker Karma car by his manager Scooter Braun.

This year, Justin Bieber kicked off the celebrations a day early when he was seen arriving at his hotel in the early hours of Wednesday morning accompanied by Ella-Paige Roberts-Clarke and two other girls.

Justin Bieber certainly seems to be making the most of his current stint in the UK, and has been partying up a storm at a number of London hotspots since he arrived in the city last week.