Madonna once threatened to "kill" Bloc Party's security guards after they put her in a headlock and frogmarched out of a concert. Bloc Party frontman Kele Okereke says the pop superstar visited their dressing room backstage at the London leg of the Live Earth concert earlier this year (07), only to be tackled by their security staff. He says, "She's a super-huge fan. But our tour manager is this guy from Scotland who doesn't know much about popular culture. "So when she came in, he alerted security and security dragged her out. In a headlock. It was really surreal, and everyone stopped speaking. "And all we could hear is Madonna cursing and saying she's gonna kill these guys. She's really tough because of all that Pilates that she does, so she got out of the headlock quite easily."