Paul McCartney's Killer mask

Sir Paul McCartney wore an Alice Cooper mask when he met The Killers.

The Las Vegas rockers' frontman Brandon Flowers was stunned into silence by the bizarre encounter with the former Beatles star following his group's show at London's Royal Albert Hall last week.

Brandon said: "We were waylaid in the corridor by someone on the way back to the dressing room - it was Paul McCartney and he was wearing an Alice Cooper mask. He was dancing around and then he took it off and introduced himself.

"At first, we all just stared at him. What do you say to Paul McCartney? Eventually, we got chatting and he told us that it had been a great show.

"Meeting a Beatle was daunting. People in Britain know what an important band they were. But when you come from the States that feeling is magnified. They were untouchable."

The 'Human' singer also admitted he and his bandmates - guitarist Dave Keuning, bassist Mark Stoermer and drummer Ronnie Vannucci Jr. - don't tend to socialise with other musicians because they are afraid no one will like them.

He added to Britain's Daily Mail newspaper: "I usually assume that people don't like us. I've tried putting myself out there but we still tend to stay in our own little corner. It's all a bit goofy."