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 licence 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."But another friend of the 26-year-old socialite said Paris is very scared about her impending imprisonment.The pal told People magazine: "She breaks down crying a lot because she just can't deal with the reality and pressure of everything that is happening."She really can't take how most people around her have scattered and distanced themselves."Paris has dropped her appeal against the sentence and will hand herself into California's Century Regional Detention Facility in just a few days.The blond will serve her time on the special needs wing of the prison for her own protection.Her cellmate - a reckless driving convict - has been handpicked as the person least likely to try and cash-in on Paris.