Radar might have broken ground in '03 by putting the then-relatively unknown Paris Hilton on its cover, but we couldn't have predicted that she'd end up in jail, where a judge ordered her to go for 45 days starting June 5 for driving on a suspended license on top of a DUI. Leave it to the unwitting trailblazer to push new fame to an even lower level.

"Her cell would be spartan: 12-by-8 feet with a toilet, sink and a window 6 inches wide, said Capt. Alice Scott, who oversees the 2,200-inmate facility she describes as 'a very nice place,'" AP reports. "I'm very sorry, and from now on I'm going to pay complete attention to everything. I'm sorry, and I did not do it on purpose at all," Hilton told the judge.

Then, Friday night, TMZ cooked up a fresh hit of meth and went to town describing everything from mom Kathy Hilton's reactions ("This is pathetic!") to the amenities at the Century Regional Detention Facility, where Hilton is ordered to stay. She'll choose from blue, brown, white, or orange jumpsuits and get only an hour a day to shower and talk on the phone. Sadly, no BlackBerrys are allowed.

What's not clear is how the heiress will get along with 2,200 other women in the Compton-area clink. To help her along, Radar turned once again to its favorite correspondent on sex, prison, and prison-sex issues, former Hollywood Madam-turned-laundromat baroness, Heidi Fleiss. Her advice for Paris after the jump ...

Fleiss, who did 21 months for tax evasion after being nabbed in a prostitution sting, doesn't believe Paris will have a hard time at all. "In 45 days," she says, "Paris will have a good time. She'll do something she's never done before, and she'll probably end up liking it."

What "something" might that be?

"She might meet her new best friend," Fleiss says. "Paris, your new best friend is going to be sleeping in the bunks right on top of you."

Fleiss continues: "As far as lesbianism, I'm sure Paris won't mind. There might be some good looking girls there. It was 97 percent gay where I was. I had two girlfriends while I was there. One at the camp, one at the big penitentiary. The first girl was like a surfer boy. She worked on airplanes."

Any inside tips for passing the time?

"You need money on your books," Fleiss says, referring to prisoner accounts (typically limited to $200 or so), "So you can buy things like some junk food or stupid things or tennis shoes. And you need someone to send you magazines."

Any advice for defending herself?

"I was playing bridge once with two white girls—these were hardcore white girls. They didn't fuck around—and one of them goes: 'Heidi, it doesn't matter how big they are, you hit them hard and first and as fast as you can.' And that night, I had a nightmare that I killed someone with a shovel. But that was the advice I got. Paris, though, she's a likable girl. She'll have no problem at all."

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