Looks like Monday may be the day Paris Hilton will head to jail. The socialite has reportedly ordered a hair and makeup team to show up at her Hollywood home at 9 a.m. on June 4. "The timing is to make sure she makes all the celebrity weeklies," says an insider. "Paris is a genius at marketing herself. She managed to turn having a sex tape to her benefit, and she's going to do the same out of going to prison. It's not just about marketing, it's about making money. If she can set up her entry into jail in a very grand way, the payoff will be greater." Hilton, who has made a point of being photographed with books in hand frequently over the past few weeks, has plans to pen a prison diary during her 23-day stay in the slammer. "If she can make it believable, and not exaggerate too much, she might expect to make a million dollars out of it," says the source. "Paris doesn't do contrite very well. She will be glam, and Paris is the queen of the prop. Expect her hair pulled back in a ponytail, big sunglasses and maybe a Holy Bible under one arm. And she just got a new kitten, so maybe she'll hand it to her sister as she gets out of the car. There might even be tears." The Hilton sisters showed up at last night's BlackBerry Curve launch party, though Paris declined to speak to the press. "I'm not doing interviews," she said. Younger sis Nicky, however, thinks Paris was unfairly sentenced. "I think she should definitely be punished, but going to jail for a traffic violation is pretty absurd," Nicky told People mag.