Movie icon Shirley Maclaine is keen to expose the Hollywood restaurants that encourage staff to tip of the paparazzi when celebrity diners arrive.

The actress has launched an investigation to find out how much waiters and bar staff at certain Hollywood hotspots get paid for calling in tips about stars.

MacLaine admits she's horrified by the media's interest in modern movie stars, and she feels it's time to expose the people who make their lives a misery.

She says, "These restaurants, particularly in Malibu, they (tipsters) get $600 a call.

"I did my little investigation, and that's what they get. They do the call if Britney Spears and the dancer (Kevin Federline) show up."