MIKE&TRICIA'S HOLLYWOOD DIRT REPORT

RIHANNA REVEALS MORE THAN HER CURVES: RIHANNA doesn't just appear on the cover of the new "Rolling Stone" in painted-on shorts, she also revealed her preferences in the bedroom. Not surprisingly, she's a little kinky. (--In a nutshell, she likes to be spanked, tied up, and being submissive.)

Rihanna also discusses CHRIS BROWN. On the recent easing of the restraining order ... "It doesn't mean we're gonna make up, or even talk again. It just means I didn't want to object to the judge."

On rumors she wants some kind of relationship with Chris ... "We don't have to talk again ever in my life. I just didn't want to make it more difficult for him professionally. What he did to me was a personal thing. It had nothing to do with his career."

ROMANCE REPORT: COURTENEY COX was photographed on the Caribbean island of St. Barts Tuesday with  her "Cougar Town" co-star JOSH HOPKINS.

And before the they're-hooking-up rumors could even get started, Courteney's rep was quick to get out ahead them, saying, quote, "Courteney is there with Josh, Coco and some other good friends. Strictly platonic."

Really??? Who goes on a "platonic vacation"??? Do you? Have You?

THE REAL REASON BRAD WON'T MARRY ANGIE???: BRAD PITT usually dodges questions about when ANGELINA is going to make an honest man of him, but at a recent meeting with his "Plan B" entertainment company employees, Brad cracked everyone up when he joked ...

"Look what happened to the careers of [Angie's exes] Billy Bob Thornton and Jonny Lee Miller. They both went in the tank after they split with her. I just can't risk it." Well, some chismosa at the meeting repeated Brad's joke to Angelina, who didn't find it funny AT ALL. A friend of hers said "Angie...accused Brad of calling her poison! Even after 6 years together, she still doesn't get his sense of humor."

COULD BE TRUE COULD BE CRAP: JESSICA SIMPSON found out the hard way no one gets a break at the Eepartment of Motor Vehicles when she asked for special treatment while waiting to renew her license in Hollywood last week.

An eyewitness tells one of the gossip sites, “Jessica…went to the front desk and asked in a low voice if she could have a private room while waiting for her number to be called." But “the no-nonsense female staffer” shot back in a loud enough voice for all to hear, ‘Miss Simpson, we didn't do that for the governor and we certainly aren't doing that for you!"

Jessica went back to her seat and "pouted and scowled as she sat with her arms folded and stared straight ahead, kicking her feet” for the next two hours until her name was called.

QUOTE/UNQUOTE: "There's so many people out there who try to imitate what I do, but I am the original." -- PARIS HILTON, when asked about being overshadowed by KIM KARDASHIAN in an interview with the Associated Press.

(--Paris and Kim were BFF's once, but have drifted apart over the years as Kim started to become a bigger name than Paris.)

Speaking of the Kardashians ... *Are* they really lazy and untalented, and just famous for being famous? Not if you ask their mom, Kris. "That's a huge misconception," she tells Redbook.

 "They work 25 hours a day. They might not be singers or dancers, but they certainly know how to produce a television show." And apparently, they also know how to control time.

Click the pic for a closer look at the adorable Mason

BABY NEWS: ELIZABETH BANKS is a new mom. She and her husband welcomed Felix this week via surrogate mom. Banks said they used a surrogate because, quote, "I have a broken belly."