Cameron Diaz watched two topless beauties “rub slime on each other” at a raunchy New York City sex show.

The ‘Shrek the Third’ star partied until 4am at the Box nightclub on Christie Street and allegedly couldn’t take her eyes off the racy adult show early Wednesday morning.

“The show had two topless girls rubbing slime on each other and wrestling, followed by a simulated ‘sex show’ conducted behind a silk screen. Cameron was staring the whole time,” a snitching spywitness tells the New York City press.