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Cameron Diaz can't seem to swallow a morsel of food these days without getting the rumor mill cranking about her love life. Last week, she was spotted dining at the Chateau Marmont in Los Angeles with her British model-squeeze Paul Sculfor, an outing that came amid growing buzz that they're kaput. Now, the actress has touched off more romantic speculation after hitting the Chateau for lunch on Saturday with Maroon 5 front man (and Kidney Now! benefit concert participant) Adam Levine. "They looked really excited to be together," a spywitness informs "Cameron was laughing at all of Adam's jokes and they seemed like such a perfect match. They were even dressed alike!" Still, a shared love of jeans and white shirts doesn't necessarily indicate there's a love match in the making, nor does a shared romantic history: Levine was once linked to Jessica Simpson, who dated John Mayer, who once spent some quality time with Diaz. Cameron's rep didn't respond to our request for comment on the romance rumors.

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In related hookup chatter, has Hayden Panettiere caught the eye of another older man? The London Daily Mail hints that the "Heroes" starlet, 19, is getting to know British TV host Steve Jones, who, at 32, is just one year older than her co-star ex, Milo Ventimiglia. The pair was spotted soaking up harmful UV rays on board a yacht at the Cannes Film Festival on Monday, with Panettiere going for maximum tanning exposure in a teeny green bikini. This is the latest round of hang time for the duo: Last week, Hayden joined Jones, who has been linked to the disparate likes of Halle Berry and Pamela Anderson, for dinner in London.

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There's nothing like a romantic revivification to show that chivalry is not dead. On Saturday, there was definite courting going on as reunited lovebirds Pink and Carey Hart lunched at a Los Angeles-area eatery. "They looked very much in love and happy to be back together," a spy opines to People magazine. "The way Carey treated Pink was so sweet. He was a gentleman and even opened the car door for her." The couple, who split in 2008 after two years of marriage but reconciled earlier this year, even made a touchy-feely exit from the restaurant. "Carey kept caressing her back," recalls the eyewitness. "They looked very much in love."

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Here are words sure to send a chill down the spine of every eligible bachelor in Hollywood: Sienna Miller, singleton. The London Daily Mirror says the romantically fickle starlet, who was labeled a home wrecker after she was caught polishing Balthazar Getty's tonsils sans top, is "finally" done with the still-married father of four. "Sienna loved being with Balthazar, but there was too much baggage and she couldn't commit to anything more than a few months," explains an insider. "They are still good friends." The paper also points out that she remains friendly with Josh Hartnett, whom she was first linked to following a thigh-grazing interlude more than two years ago. "Josh and Sienna have a unique bond," asserts the snitch. "They understand each other and I wouldn't be surprised if a relationship blossomed."

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Jennifer Aniston may or may not have gotten her flirt on with Bradley Cooper during a recent night out in New York, but it appears that rampant rumblings of Jen and Brad 2.0, were exaggerated. "I met her three times in my life," the actor scoffs to People magazine. "I'm very flattered." Alas, his lack of game with his golden-haired "He's Just Not That Into You" co-star, whose new movie, "Management," fizzled in limited release over the weekend, will be a big disappointment to his mother. "My mom loves it," he says, "but unfortunately, it's not true."

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