GRIN AND BARE IT

Kay Lenz goes undercover as a cop--then uncovers --by posing as a stripper in New Horizon Pictures’ “Stripped to Kill,” due in February.

The former Mrs. David Cassidy spent time in real strip joints to familiarize herself with the profession. “Because I’m a policewoman, I don’t have to be a great dancer,” said Lenz, who takes it off to music twice in the pic. “In fact, after I win on amateur night, the owner tells me, ‘You’re the worst dancer I’ve ever seen, but you’re hired!’ ”

Lenz, who said that she’s about to turn 34, worried that she’d seem too old to portray an exotic dancer . . . “until I learned that several of the real dancers I met were putting 18-year-old kids through college!”

SI David Pecchia