Poor Lindsay Lohan seems to have taken an early lead in the field for Worst Actress at the Razzies with “I Know Who Killed Me.” She plays a college student and her twin sister, a stripper who washes pills down with booze, — both of whom lose a pair of limbs to a serial killer in this appalling slice of torture porn, which I award zero stars in today’s Post. Thanks to a tongue-in-cheek review at L.A. Weekly, it rates 10 percent favorable reviews at Rotten Tomatoes. Early projections quoted by Steve Mason at Fantasy Moguls have the flick collecting a meagre $1.2 million, good enough to barely edge “Who’s Your Caddy” out of ninth place, with a predicted weekend finish of a pathetic $3.2 million. At the other end of the Top 10, “The Simpsons Movie” exceeded expectations with a $28 million Friday and Mase prognosticates a whopping $67 million over three days. The other major opening, “No Reservations,” is now expected to collect a lukewarm $11.5 million for a fifth-place finish over the weekend.