Eva Mendes plays the "other woman" in Jada Pinkett Smith's steamy on-screen lesbian relationship in Diane English's all-female film "The Women," and gets down and dirty with former model-turned-actress Natasha Alam.

"It was a lot of fun, not awkward at all," Alam told Pop Tarts at last week’s Los Angeles premiere. "Eva is a great kisser; she gets 10 out of 10. Amazing."

But on the topic of relationships, even after six years with boyfriend George Gargurevich, Mendes has no intention of signing marriage papers.

"I’ve been with the same person for a very long time, but I’m just unconventional in that way. I don’t think people need to be married," she said. "I think a lot of people need that piece of paper but I don’t think everybody needs that to feel secure."

Mendes' co-star Pinkett Smith brought her hubby Will Smith to the star-studded premiere, where he got scolded for not being on his best behavior.

"I'm in trouble and have been told to stay quiet," Will told Tarts. "I'm in a hyperactive mood and am saying things I shouldn't."

There was certainly a lot of estrogen on the red carpet, as Mendes and Smith were joined by their A-list counterparts Annette Bening, Meg Ryan and Debra Messing.

Paris Parties; Hayden Panettiere Avoids Fight

Just when we thought Paris Hilton had reformed from her wild ways and settled down with beau Benji Madden, the party princess has blasted her way back on the scene in a very big way.

The hotel heiress recently hit the grand opening of Hollywood hotspot Apple (where she danced the night away with "frenemy" Lindsay Lohan), and went clubbing several days in a row last week in Sin City.

Also last week, Pop Tarts caught Hilton at a pre-party for the MTV Video Music Awards. She was also at Nylon magazine’s TV Issue launch at the Roosevelt Hotel last Thursday and back at Apple with Madden last Friday, where she partied until the early hours.

On Saturday, Paris and Benji went on a double-date with her sis Nicky and Dave Katzenberg at the Svedka Vodka/Talenthouse.com private party at the Chateau Marmont. Sacha Baron Cohen, his girl Isla Fischer, Jermaine Dupri and Russell Simmons also attended alongside Hayden Panettiere and her older man Milo Ventimiglia.

We're told Miss P sat on her "Heroes" co-star and lover's lap the entire night, but led him out even before dinner was served. Why? Stephen Dorff arrived and apparently Milo can't stand him and refused to stay in the same room.

But back to Hilton, the singer/socialite is getting ready to launch a brand new "Paris For President" clothing collection exclusively to Hollywood’s Kitson boutique. We’ve also heard word that she plans to release another presidential PSA.

Kirsten Dunst 'Lucky' to Have the Money for Depression Treatment

When it comes to bank flow, Kirsten Dunst certainly isn’t running short. But the actress is grateful that she was able to check herself into rehab to treat her depression when the average American can't always afford such a luxury.

"I'm lucky that I had the resources and the money to take care of myself," Dunst told the October issue of Harper’s Bazaar. "I wasn't taking care of myself emotionally. I wasn't expressing my anger; I was making nice all the time."

The "Spider-Man" starlet had a quick stint in Lindsay Lohan’s former stomping ground Cirque Lodge in Utah in March this year.

And although the 26-year-old says she isn’t a Scientologist, she keeps a plastic-framed copy of L. Ron Hubbard's Scientology Code of Honor in her home, which was given to her by longtime pal Tom Cruise.

Rachel Bilson Gets Ready for Wedding in Sin City

Rachel Bilson isn't about to become a bride, but her best friend Jill Stonerock is, so Bilson proudly hosted her weekend of bachelorette bashes.

The former "O.C." hottie and the bridal posse hit up Las Vegas hotspot The Bank on Friday night, where the gals apparently fed each other cake until the wee hours.

The glam gal group then recovered poolside on Saturday in a private cabana at the tops-optional Bare Pool Lounge at The Mirage. Much to the dismay of onlookers, modest Rach chose not bare her breasts.

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