Paris Hilton may have only spent 23 days in the pokey, but she seems to be making up for plenty of lost time. On Thursday, the debt-to-society-paying starlet did her best "Baywatch" imitation by hitting the Malibu shore with Adrian Grenier. Paris, who was uncharacteristically demure in a cutout-free, one-piece swimsuit and boy shorts, cavorted in the surf with the be-stubbled "Entourage" star as an army of shutterbugs chronicled their every splash. That night, they posed together at the premiere of Leonardo DiCaprio's environmental flick "The 11th Hour," and a few days later, the actor popped up at Paris' pad with some of his pals (per TMZ). So, is Grenier following in the well-trod footsteps of dangerously droopy rocker Cisco Adler, some random Australian surfer dude and NASCAR driver Kasey Kahne, all of whom have reportedly swapped spit with a post-lockup Paris? Not so much. "They are just friends," Hilton's rep insists to "Entertainment Tonight." "There's nothing between [them]." Turns out Grenier, who is reportedly dating Sports Illustrated model Melinda Keller, is working on a documentary about the symbiotic relationship between stars and the paparazzi, which means his hang-time with Paris may have been strictly educational, a first for her.

Is Kate Hudson's budding romance with Dax Shepard on fast-forward? The New York Post claims the pair, who were first spotted together last month and recently enjoyed a Canadian getaway with the monogamy-wary actress' family, are cohabitating in Los Angeles. "Dax is basically living at her house right now," a spy alleges to the paper. This supposedly has some members of Hudson's inner circle "a little annoyed," although ex-husband Chris Robinson isn't one of them. "Chris is thrilled because now he can have [their 3-year-old son] Ryder whenever he wants," maintains the snitch. "Kate gets a little more distracted when new men come into her life." Hudson's spokesman, however, blasts the report, telling the paper dismissively, "None of what you're speculating here is accurate."

It's been a long time since "Swingers," but the beautiful babies still seem to think Vince Vaughn is totally money. According to the New York Daily News, the baggy-eyed, barrel-chested funnyman recently hit Los Angeles hot spot Crimson, where he "prowled the room" before heading out with a "small group of blondes."

Ashlee Simpson is apparently determined to be only one who smudges boyfriend Pete Wentz's eyeliner. The New York Post says the refurbished warbler blocked female fans from getting too close to the Fall Out Boy bassist during a recent night out in Chicago. A bystander tells the paper Ashlee became "whiny and dragged him away" when his admirers wanted to take pictures with him.

"My relationship is everything to me." That's Clive Owen, talking to Playboy about Sarah-Jane Fenton, his camera-shy wife of a dozen years (they have two daughters). The easy-on-the-eyes actor also declares, in what is either a supreme act of confidence or hubris (your call), that his co-stars have always been and will always be off-limits (his leading ladies have included Angelina Jolie, Jennifer Aniston, Julia Roberts and Monica Bellucci). "I so value what I've got at home with my wife and kids that I've never [bleeped] with that," he avows. "For me, that's what it's about ... I've had some great times with actresses, but that's in a movie. It's a fun thing to do, but it's not love. So I never have a problem with that." According to Owen, his big-screen success "would mean nothing if I were floating around and didn't have a solid family behind me. Sarah-Jane is an absolute diamond."

Was Sienna Miller reading bodice-ripping romance novels during her recent beach getaway to Saint-Tropez, where she hung out with good friend Diddy? Not only does the London Sun quote the starlet as saying she will love repeat ex Jude Law "forever," but it also claims she rhapsodized, "Our stolen moments were bliss." The actor, for his part, is denying a spate of tabloid reports claiming he's wooing his "Holiday" co-star Cameron Diaz.

Next: Love on 'Bulimic Liars,' Amy 'Out of Control'