Sir Paul McCartney is cautious whenever he meets people who describe themselves as a "fan" - because he fears they're fanatics who are out to attack him.

According to his wife Heather Mills McCARTNEY, the British rocker is concerned about meeting the same fate as his former Beatles bandmates: John Lennon, who was shot to death at the hands of a fan, and George Harrison, who survived a stabbing.

And Mills McCartney warns those hoping to secure a chat with their idol should avoid referring to themselves as fans.

She says, "The word fan means fanatical. So when you go up to Paul, don't say you're a fan, say, 'I'm a great admirer.' Because a fanatical person is someone that shot John Lennon and stabbed George Harrison."