Lady Gaga - Gaga Fan Questioned By Cops Over 'Backstage Break-in'

The Poker Face hitmaker put on two sold-out shows at the huge venue in the U.K. capital, but was left shocked before Thursday's (16Dec10) concert when she was informed a devotee had made her way backstage.

The woman had forged passes which helped her evade the star's security team - and she was only caught out by Gaga's management as she made her way to the singer's dressing room, according to Britain's Daily Mirror.

Police were called and the woman was reportedly released after questioning.

A source tells the newspaper, "This was a serious breach of security and the woman was heading in the direction of the stage and, more worryingly, Gaga's dressing room.

"This woman had gone to great lengths to produce all the fake ­documentation so she could move at ease in the holding area backstage.

"Gaga was understandably shaken by the incident but was a consummate professional and continued as per normal, putting on a dazzling show."