Does Paris Hilton have some 'splainin' do do to Benji Madden? Seems the starlet, who recently gushed that her beau of eight months is her "best friend" and she's "the luckiest girl in the world," was snapped in proximity to former flame Stavros Niarchos as she partied in Miami in the wee hours of Saturday, sparking rumors of a touchy-feely reunion. "They slipped in secretly together holding hands very, very early in the morning," a bystander alleges to OK!. "They were cuddling and whispering together all night. Stavros was making Paris laugh. She couldn't stop smiling when he was around and they were dancing together very closely." Conclusion-leaps the spy, "They looked like they were back to their old ways, and you never would have thought she had a boyfriend. She was all about Stavros. They left together and went back to their hotel." Star also found an eyewitness to Hilton's alleged friendliness with her Greek billion-heir ex, who claims, "Paris and Stavros were all over each other. They were at the same table for about an hour, and then they left together. It didn't seem like Benji was on her mind at all!"

Jen and John are spotted at Los Angeles' Sunset Tower Hotel on Oct. 28. (©X17Online.com)

Jennifer Aniston was sans John Mayer as she stepped out Saturday night in New York to join the likes of Justin Timberlake and Natalie Portman at a post-"SNL" bash, but the pair seems to be of one mind -- and closet -- these days. On Thursday evening, the "uncool"-spouting actress, 39, and the verbose crooner, 31, donned matching head-to-toe black as they enjoyed dinner a deux at a Manhattan eatery, where Us says they "couldn't keep their hands off each other." Just prior to the PDA interlude, Mayer hit the Keep a Child Alive Black Ball benefit and proceeded to blab about Aniston to the press. "It's really nice to have somebody in life have your back," he rhapsodized to People. "That girl knows me ... so whether I go to bed alone or not, to have somebody who knows you in this world, that's a really nice thing." Speaking of Mayer's sleeping arrangements, Us says that Aniston rarely wakes up at his Los Angeles digs. "John sleeps over at Jen's place all the time -- but not the other way around," says a snitch. "Jen loves her privacy, and she is a huge homebody. She has a mini-gym, her trainer comes to her, her backyard is completely shielded from paparazzi and she has an excellent security system. She feels safe."

Has Sharon Stone turned in her cougar membership card? The London Daily Mail claims the actress, 50, has cut 24-year-old boyfriend Chase Dreyfous loose. Stone was spotted cozying up to the baby-faced Dreyfous at a fashion party back in August, not long after they reportedly met through her charitable foundation. But the paper believes her recent wrangling with ex-husband Phil Bronstein over custody issues relating to 8-year-old son Roan (among other things, he accused her of suggesting the tyke's stinky feet be treated with Botox, a charge she vehemently denied) quelled the passion in the romance. "The whole custody thing really devastated Sharon," says a source. "She has always devoted herself 100 percent to her children. The stuff about the Botox and so on that came up in court was totally invented. But the sad fact is it took the spark out of her relationship with Chase. Right now her focus is on her family." Stone, who is also mom to sons Laird, 3, and Quinn, 2 (like Roan, they were adopted), has no comment on the breakup chatter, while Dreyfous tells the paper, "I've known Sharon for about a year and a half. We've always been friends. I don't want to say any more than that."

Is Bill Murray exploring his attraction to women 30 years his junior? (©AP)

In other May-December news, Bill Murray appears to be energetically rebounding from his nasty, accusation-filled divorce from wife Jennifer. The Chicago Sun-Times reports that the funnyman, 58, broke bread Friday night with reigning Miss USA Crystle Stewart, 27, at a local eatery. No word on whether they spent the meal figuring out just how old the beauty queen was when some of Murray's biggest hits were released (for the math-deficient, she was all of 3 when he starred in "Ghostbusters"). After dinner, the uncharacteristically congenial actor yukked it up at the valet stand with a group of female fans, who "started to squeal with joy" when they saw him. According to the paper, Murray then channeled his inner Richard Dawson and kissed each and every one of them before taking his leave. While it's unclear if Stewart, who in her non-crown-wearing life is a model, party planner and motivational speaker, was also on the receiving end of his pucker, she can at least match the comedian pratfall for pratfall: She took a spill while competing in the evening gown competition of the Miss Universe pageant.

Is there no originality left when it comes to trading icky love tokens? The London Sun says that Kate Moss got into an argument with boyfriend Jamie Hince after she discovered he'd kept a vial of blood given to him by an ex-girlfriend, who was apparently a big fan of Angelina Jolie's onetime plasma-swapping passion for Billy Bob Thornton. Seems the veteran supermodel found the bottled bodily fluid among a stack of love letters from the Kills front man's former flame, Sharin Foo of the Raveonettes. "It wasn't like he used to get them out and read them all the time. He could just never bring himself to throw them away," a mole explains to the paper. "But now Kate's found them [and] she's gone through the roof. She has demanded to know why Jamie had all these reminders of a past relationship." The twosome purportedly retreated to Moss' country house over the weekend to "patch things up" (and change the bulbs on the neon "trust issues" sign seemingly blinking nonstop above them).