Osbourne, pink-haired daughter of heavy metal legend Ozzy Osbourne, had been scheduled to perform at the NME awards later Thursday, but became concerned after seeing images of tanks and soldiers patrolling near London’s Heathrow Airport, said spokeswoman Naz Ahmed.

Britain has deployed hundreds of soldiers at Heathrow, Europe’s busiest airport, and beefed up security at airports and other sites this week after police warned that al-Qaida might try attacking London during this week’s Muslim festival of Eid al-Adha.

“Kelly’s parents were in New York on Sept. 11 when the Twin Towers came down so you can imagine how they feel,” Ahmed said.

“The decision wasn’t taken lightly and Kelly has thought long and hard about it.

“She is upset that she can’t come to Britain because she was really looking forward to it.

“But as well as herself and her parents, she also has a whole crew and band to think of and she has decided not to take the risk.”

Osbourne’s Feb. 19 gig at London’s Electric Ballroom has been postponed.