Cameron Diaz and John Mayer continue to make beautiful music together. A spywitness tells People the lanky twosome, who were first spied looking cozy last week in New York, were "all over each other" and "super-flirty" while making the scene at New York's Bowery Hotel on Friday night. Diaz, 34, and Mayer, 29, "were laughing and talking a lot" as they snuggled up on a sofa out on the patio, where they were served "several rounds of drinks." A source close to the former floppy-haired flame of Jessica Simpson tells the mag the two are indeed a fledgling item, proclaiming, "Yes, it's definitely true."

Meanwhile, is Diaz ex Justin Timberlake trying to have his ridiculously hot cake and eat it too? The New York tabloids claim the crooner beau of Jessica Biel was bringing sexy back en masse last week as he chatted up a bevy of beauties at a New York shindig to celebrate his HBO concert special. The New York Daily News reports he had "six women" circling him at the soiree, although a dark-haired lovely who resembled his ex, Jenna Dewan, "seemed to hold his interest." Meanwhile, the New York Post says he was "sitting with a bronze-skinned brunette with long brown hair all night at a cocktail table near the dance floor" at the bash. "They were obviously into each other," a conclusion-leaping eyewitness contends to the paper. "It was just the two of them ... he had no entourage at all." Meanwhile, an insider pipes in that Timberlake is "notorious" for his -- how do we put this delicately? -- less than discriminating courting practices. As usual, the chart-topper's rep refused to comment on his private life.

Reese Witherspoon is soaking up the New England scenery during a summer sojourn in Martha's Vineyard with her kids, but is she also getting in some quality time with rumored-to-be-rekindled squeeze Jake Gyllenhaal? That's the word from the Boston Herald, which reports the "Rendition" co-stars have been relaxing with Reese's doppelganger tykes, Ava, 7, and Deacon, 3. The comely Oscar winner, 31, is said to be staying with pals, while Gyllenhaal, 26, is reportedly crashing at his family's house on the island.

Meanwhile, Us Weekly is convinced Ryan Phillippe is fuming over his estranged wife's coziness with the dreamy-eyed actor. "Ryan is pissed about Jake," a source close to the actor tells the mag, alleging he sniped to Reese "he didn't want 'that guy' around their kids then made some crude 'Brokeback Mountain' remark." Phillippe, for his part, is supposedly back in the company of Australian actress Abbie Cornish, whom he was linked to right around the time his marriage to Witherspoon imploded (both have denied the romance whispers). "They have been hanging out [again] since June," an insider asserts to Us, which says the "Stop Loss" co-stars were spotted together at a Los Angeles park on Aug. 5. "They were laughing," recalls a spy, "and obviously enjoying themselves."

Kate Hudson's son Ryder doesn't seem to be lacking male role models. Paparazzi snapped the long-locked tot, 3, receiving a piggyback ride from similarly coiffed pop Chris Robinson as they strolled in Boston on Wednesday with the actress, who is in town filming "Bachelor No. 2." The next day, Ryder was captured on the shoulders of his mom's new man, comedian Dax Shepard, as they perambulated around the city with Kate. And it was more of the same on Friday, with a scruffy-looking Hudson and Shepard caught nuzzling while pushing Ryder in his stroller.

Jennifer Morrison and Jesse Spencer were apparently serious when they said they remain "very close" despite their nixed nuptials. USA Today reports the "House" co-stars turned up for the Hot in Hollywood charity event a few days back and sat side-by-side as they each won bids for artwork during a benefit auction. But Spencer kept his cakehole closed when asked if their new pictures would share wall space, telling the paper, "She's a great girl, but I can't say anything more." The fickle flames, whose happy mugs are featured in the latest In Style Weddings issue, reportedly hung out all night, downing beers and sucking on cancer sticks together. Meanwhile, one of their co-workers says their decision not to spend forever together has had no effect on the FOX series. "They really have never brought their relationship onto the set to begin with," Lisa Edelstein tells People, "so they're not bringing their breakup onto the set either."

Do Kathy Griffin's turn-ons include hirsute millionaires who ride Segways? Star says the firm-faced "My Life on the D-List" funny lady is seeing grizzly Apple co-founder Steve Wozniak, whom she met last month after he turned up to see her perform in Florida. Griffin divorced husband Matthew Moline last year after accusing him of making off with $72,000 from her bank account. "Kathy has never given up hope that she'd meet Mr. Right," a "pal" tells the tab. "Hopefully Steve will be that guy."

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