Lindsay Lohan is planning a secret birthday party to celebrate her 20th birthday tomorrow.

The star is worried her party could be ruined by the paparazzi so has hinted that she is flying out to the Caribbean.

"I'm going to go away, out of the country and do something fun and different. They won't find me," she told Harper's Bazaar magazine.

"No one can get a picture of you on Turks and Caicos. I go there with my family, and it's the perfect place to go with a guy," she said.