Actor Michael Cera looks to us like he'd be scared of his own shadow, let alone sexually aggressive fans who aren't afraid to proposition celebrities. The Juno star recently admitted to Rolling Stone magazine that he was involved in an incident with a "demoinic and terrifying" fan, who approached him outside a cinema in LA and offered to...ahem...play his private pipe. "I pulled away from her," he explains. "And the cigarette smoke was just falling out of her mouth. It was such a scary image. And then I saw her pull her shirt down for some other guy. There was something demonic and terrifying about it. She was completely crazy. All it did was make me put a few more bricks in the wall I already have." Bless his terrified little socks! Have you ever done anything embarrassing in front of somebody famous? We once asked Danny from McFly if we could sniff his hair when we were drunk (and he let us, it smelled lovely). Oh, and there was also that over-friendly incident with Heston Blumenthal...eeek!