It's been just over a week since Drew Barrymore and Justin Long confirmed their parting of ways after nearly a year of saliva-soaked coupledom, but already a tabloid is attempting to link the actor-cum-Mac guy to someone new. OK! claims he was spied strolling around New York on Wednesday morning with Kirsten Dunst, who just a few days back was reportedly seen smooching a DJ and having a cozy tête-à-tête with onetime make-out partner Josh Hartnett. "Justin was holding Kirsten's hand while walking around downtown NYC in the SoHo area," alleges a spy, who seemingly shadowed the pair's movements for quite a while. "They stayed out all night and Kirsten was all over him and kept leaning in to kiss him." But a source close to Long dismisses the magazine's version of events as so much fiction. "It's totally not true," the insider insists to MSN Entertainment, laughing off any suggestion of lip-on-lip action. "They're just friends. That's it. They're not together." Besides, Dunst, who has a history of offering Drew's former flames a shoulder to cry on (shortly after Barrymore's five-year romance with Strokes drummer Fabrizio Moretti imploded in early 2007, he was snapped dining out with Kirsten), may have her eye on someone else. According to the New York Post, the rehab grad was recently spotted puffing on a cancer stick outside a Manhattan hot spot, where she was supposedly looking to meet up with "Speed Racer" actor Emile Hirsch. "She was all alone," a mole maintains to the paper. "She was going to the bar just to see him."

Orlando and Miranda get handsy at the Raisa Gorbachev Foundation Gala on June 7.

Meanwhile, in other dubious dating news, In Touch wants us to believe that leggy looker Miranda Kerr has gone from the sensitive, soul-patched A-list likes of Orlando Bloom to the unctuous, perma-sweaty ickiness of oil heir Brandon Davis, who's best known for dating Mischa Barton and dubbing Lindsay Lohan with that unflattering, lady parts-inspired nickname. A spy alleges to the mag that Kerr and Davis were "full on making out" (ugh, we need a moment to force our lunch back down) at a pair of New York clubs -- 1Oak and the Beatrice Inn -- on July 12. "They didn't seem to care who saw," recalls the onlooker. Yeah, we have a hard time swallowing the idea that a Victoria's Secret model would settle for such a serious downgrade from Bloom, especially given that they were photographed sunbathing sans clothes just three weeks ago. And it looks like we're not the only ones. Miranda's brother and mother tell Australia's Daily Telegraph they're "frustrated and upset" over the tab's claims. "We were just out with a few other friends from Australia having a good time and we bumped into Brandon while we were at 1Oak," Matthew Kerr recounts to the paper of the night in question. "They have been friends for a while and we just said hi, chatted for a bit and that was it. There definitely wasn't any kissing -- nothing could be further from the truth." Chimes in Miranda's mom, "I realize there is an interest in people who are in the spotlight, but I just can't believe how far from the truth it gets. Miranda and Orlando have never been closer and are happier right now more so than ever. He's meeting her in Paris next week."

Sienna and Balthazar -- fully clothed.

Another day, another topless, camera-captured clinch between Sienna Miller and Balthazar Getty. On the heels of their recent paparazzi-documented displays of skin-heavy passion while sailing off Italy's Amalfi coast and dining on a hotel balcony, the unabashed lovebirds have now been snapped rolling around without their shirts on a rocky and uncomfortable-looking beach. A snitch tells People the semifamous starlet, 26, who called it quits with Rhys Ifans a few weeks back, has been surreptitiously seeing the still-married "Brothers & Sisters" actor, 33, for "at least two months." Their blatant PDA has sent eyebrows shooting skyward, because not only does Balthazar still have wife Rosetta's name tattooed over his heart, but they also have four children together, including a 10-month-old daughter. A source helpfully reveals that the Gettys, who tied the knot eight years ago, "have been living separate lives for a while," although that apparently hasn't taken the sting out of his indiscreet frolicking with Miller. "It's humiliating," a confidante asserts to People. "Rosetta left the country to protect the kids, and he continues to see Sienna publicly." Sienna reportedly met Balthazar through his "Brothers & Sisters" castmate Matthew Rhys, whom she was romantically linked to last year and co-stars with in the forthcoming drama "The Edge of Love." A mole tells the magazine that Rhys was "livid" when the touchy-feely shots appeared.

Looks like the promotional machine for "High School Musical 3" is kicking into high gear. Stars Zac Efron, 20, and Vanessa Hudgens, 19, were opportunely snapped by In Touch looking oh-so-cozy -- there was even some non-Disney-esque straddling -- as they enjoyed the sun, surf and sand during a recent getaway to the Turks and Caicos. According to the tab, the sweetie-pie squeezes holed up at the "exclusive, secluded" Amanyara resort, where the swankier villas can set you back about $8,000 a night. "They looked like a happy young couple," opines a spy, who says they were "laughing all the time." Adds another eyewitness, "They were nice to all of the kids who approached them. They were a very gracious couple." Zac showed off his tan -- and some wispy stubble -- as he hit the red carpet at the ESPY Awards on Wednesday night in Los Angeles.

Color us surprised, but Mariah Carey might actually make it to her three-month anniversary. The high-maintenance chanteuse told Ryan Seacrest on Wednesday that she's achieved a much-needed work-life balance with her marriage to Nick Cannon, whom she wed in a surprise ceremony in the Bahamas on April 30. "I can have a personal life, and I can have a life making records and doing whatever other creative things I want to do," she explained to Seacrest on his radio show. "[Life now] is a lot more enjoyable, and it's preferable, it's 'quite pleasant' as I like to say." Mimi, who is out promoting her new single, "I'll Be Lovin' U Long Time," and her new perfume, Luscious Pink, also hit Disney World on Tuesday with her hubby. While at the Happiest Place on Earth, the self-described eternal 12-year-olds posed with Mickey and Minnie and braved both Space Mountain and the Twilight Zone Tower of Terror.

Mena Suvari is ready to give "until death do we part" another try. The actress, 29, who split from her cinematographer-husband Robert Brinkmann in 2005 (he's an entire college freshman older than she is), is engaged to a Canadian music producer named Simone Sestito, her rep confirms to People. The two reportedly met at last year's Toronto Film Festival, and Sestito popped the question during a recent trip to Jamaica. "They're taking their time planning the wedding," says a Suvari insider. "They are in no rush." Mena will soon be seen opposite Matthew Modine in the Lifetime movie "Murder in Sin City," which seems a depressingly long way from her rose petal-covered heyday in "American Beauty."