EYE IN THE SKY DEPT.: Sunbathing bare-naked-birthdaysuit- nude on a galpal’s sundeck in Malibu, “Heroes” hottie HAYDEN PANETTIERE skittered for cover quicker than a crab crossing a hot rock when she heard a whirlybird, looked up – and saw it circling! Shrieking that it might be a TV news chopper, the girls grabbed towels and hauled butt…BUT… turns out it was actually a police helicopter. Not wanting to risk tickets for indecent exposure (as IF!), Hayden and pal slipped on bikinis before resuming their rays-soak.