Clear your calendars for next Tuesday, when everybody's favorite hotel heiress reports to the Century Regional Detention Center to start serving her 23-day sentence (she can show up any time between now and 11:59 p.m. on Tuesday night). Sources tell Rush & Molloy that Paris has ordered a hair and makeup team to meet her at her Hollywood Hills home first thing Monday morning - just in time to make all the celebrity weeklies. R&M also report that Hilton is "writing" a prison diary, for publication upon release. At least she's planning to publish it - aren't there prohibitions for profiting from your time in stir?