Justin Bieber has a fan in Geri Halliwell as she watches him turn on Westfield Christmas lights

She”s a Belieber! Geri Halliwell gets Bieber fever as she joins tween fans to watch the teen idol turn on Westfield Christmas lights

Star attraction: Justin Bieber performed at Westfield shopping centre this afternoon where he also switched on the Christmas lights

Star attraction: Justin Bieber performed at Westfield shopping centre this afternoon where he also switched on the Christmas lights

Fan: Geri Halliwell was spotted arriving at the event

Fan: Geri Halliwell was spotted arriving at the Shepherd”s Bush event

Put your hands up: The singer made sure he interacted with his crowd who were so desperate to see him

Put your hands up: The singer made sure he interacted with his crowd who were so desperate to see him

Popstars unite: Bieber was joined onstage by British boy band The Wanted

Popstars unite: Bieber was joined onstage by British boy band The Wanted

Mania: Thousands swarmed the centre to catch a glimpse of the superstar

Mania: Thousands swarmed the centre to catch a glimpse of the superstar

Young fans: The audience ranged from toddlers to tweens to their mothers as thousands turned out to see the star

Young fans: The audience ranged from toddlers to tweens to their mothers as thousands turned out to see the star

Singing his heart out: Bieber made sure he put on a good show for his hardcore fans

Singing his heart out: Bieber made sure he put on a good show for his hardcore fans

Beliebers: An army of fans squealed for the singer as he appeared onstage

Beliebers: An army of fans squealed for the singer as he appeared onstage

True Beliebers: Justin

True Beliebers: Justin”s fans queued overnight to see him

Stampede: A woman is knocked to the floor in the rush

Stampede: A woman is knocked to the floor in the rush

Capacity crowd: The masses make their way to collect a wristband

Capacity crowd: The masses make their way to collect a wristband

Truants: Some girls skipped school to be there

Truants: Some girls skipped school to be there

Fan club: Girls complained about the cold conditions when they slept overnight

Fan club: Girls complained about the cold conditions when they slept overnight

I predict a riot: More fans sprint to get ahead of the queues

I predict a riot: More fans sprint to get ahead of the queues

Bieber fever sweeps London as Justin

On your head: Earlier today Justin and his girlfriend Selena Gomez were pictured having a private tour of Stamford Bridge

Two

Two”s company: Justin and Selena spend some quality time together ahead of his performance

The man: Justin Bieber will be performing on that stage today

The man: Justin Bieber will be performing on that stage today

Daybreak: Fans who queued over night are almost at the front of the line

Daybreak: Fans who queued over night are almost at the front of the line

Peace out: One Bieber fan poses for the camera

Peace out: One Bieber fan poses for the camera

THOUSANDS SKIP SCHOOL FOR TASTE OF BIEBER FEVER
Tiny fans make the most noise

Tiny fans make the most noiseB