Justin Bieber was at the centre of a security alert on Wednesday night (06Jun12) when hundreds of his fans stormed a TV studio in London.
The Baby hitmaker, who had donned a sequinned mask as a disguise earlier in the day, was at Itv's The London Studios to film chat show Alan Carr's Summer Specstacular (sic) and an estimated 300 determined devotees pushed their way into the building in a bid to meet their idol.
The girls were chased by security guards and staff managed to bolt the doors shut after evicting the Bieber enthusiasts.
A source tells Britain's The Sun, "It was genuinely scary. They're only teenage girls but they were hysterical and had just one thought on their minds - to see Justin Bieber. It was pandemonium."