Paris Hilton's Prison Party

Paris Hilton & Nicky Hilton at the

BlackBerry Curve from AT&T Launch Party

Paris Hilton's friends have thrown her a party to wish her luck in prison.

The hotel heiress will begin her 23-day sentence for driving with a suspended license on June 5, and her pals have rallied round to try and keep her spirits up.

Childhood friend Caroline D'Amore said: "We had a little party at her house the other night. We all went round to be there for her.

"She has high hopes."

D'Amore also revealed that at Nicole Richie's infamous Memorial Day barbecue, "We all watched the first episode of the new season of 'The Simple Life', which was really cute."