Pop superstar Lady GaGa was left shocked after an enthusiastic fan stormed past security outside a London hotel in a bid to get closer to the singer.

Scores of adoring fans have been camping outside London's The Langham hotel, where the Poker Face hitmaker has been staying during her ­promotional trip to the U.K.

However, the star was left shaken last week (ends01Nov13) when one fan managed to get past barriers and two of Gaga's security guards in a bid to greet the star.

Other guards were able to stop the unnamed girl and have since blacklisted her from the hotel.

A source tells Britain's Sunday Mirror newspaper, "A girl ran in front of the barriers straight at Gaga. One of her bodyguards held out his arm to stop her, but she ran past him and Gaga's other guard. It looked like she hit the first guy and tried to get to Gaga. Her security were very angry.

"They told the girl she was being blacklisted from the hotel and that Gaga would use the back of the hotel if she turned up. She appeared on Monday and was instructed to leave."

The incident was filmed by a bystander and was later posted on YouTube.com.