Ryan and Michelle?

Ryan Gosling was photographed last week with "Heroes" cutie Hayden Panettiere, but Tuesday night he only had eyes for Heath Ledger's ex, Michelle Williams. The two had dinner at Piadina and were caught by onlookers having a cozy cigarette outside the West 10th Street eatery. The star of "Lars and the Real Girl" was "smiling and gazing at her," said our witness. Reps for both said they weren't on a date, but just discussing an upcoming film project they're working on together.

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Jessica and Tony heat up

The Dallas Cowboys had the weekend off – but quarterback Tony Romo still made plenty of passes. Jessica Simpson and the NFL star flirted up a storm Saturday at Hollywood nightclub Teddy's, as the two helped Simpson's BFF, Cacee Cobb, celebrate her 30th birthday. At first, the singer – wearing a form-fitting black dress and spike heels – and her new beau kept things low-key in a secluded booth. But as the night wore on, the two were spotted with their arms around each other. Then, after a few seconds of conversation, they leaned in for a kiss – right in the middle of the crowded club. Also on hand for the bash were Cobb's Scrubs-star boyfriend, Donald Faison, and Simpson's mane man, Ken Paves. Last month, Simpson and Romo, both 27, shared Thanksgiving dinner in Dallas. The Cowboys star has previously dated Carrie Underwood, Britney Spears and Sophia Bush.

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New couple alert: Elle and Bryan Adams?

Is there romance in the air for Canadian rocker/photographer Bryan Adams and Australian supermodel Elle Macpherson? Reports in the British papers have linked the couple in recent days, suggesting Macpherson got flirtatious with Adams at a private party at his London home on Tuesday, following the opening of his latest photography exhibit. "Elle and Bryan are great friends. That's all I know," said Adams's rep. Macpherson, 44, split with longtime partner Arpad Busson, with whom she has two sons, in 2005. Adams, 48, has never married or had children.
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Jessica hooks up with football player

On the two-year anniversary of her split from Nick Lachey, Jessica Simpson has a new man in her life: Dallas Cowboys quarterback Tony Romo. Romo has been linked in recent months to Sophia Bush, Britney Spears and Alli Sims. He has also dated Carrie Underwood. The singer, 27, spent Thanksgiving with Romo. She also showed up to watch him at a Texas home game Thanksgiving Day and referred to him as "my man" to friends. The new couple dined at the Dragonfly restaurant in the Hotel ZaZa in Dallas with Simpson's parents, Joe and Tina, and her friend and former assistant CaCee Cobb and her beau Donald Faison.
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Mandy and Matthew's LA date

New couple alert? Maybe Ashley Olsen and Lance Armstrong have started a trend. Mandy Moore, 23 and Matthew Perry, 38, were spotted on a date at Amici Trattoria in Beverly Hills last week. One source said, "He was already seated and waited for her for 15 minutes until she arrived. He stood up to greet her and gave her a kiss on the cheek. They were holding hands across the table and being really close and laughing the whole time."

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Exes caught smooching

Christina Applegate and Jonathan Schaech's divorce was finalized in August, but the former couple apparently still have eyes for each other. Applegate, 35, and Schaech, 38, ran into each other unexpectedly at LA hotspot Les Deux on Friday night - and ended up having a close encounter. "They just made out all of a sudden," said an observer. "They didn't really look around to see who was looking, it just happened, but it wasn't weird after. They just went along talking to friends and separated soon after and both kept partying." The former pair were also seen holding hands, but each ended the evening with pals. Applegate was hanging out with girlfriends Eva Longoria and Sara Ramirez. A rep for the Samantha Who? star said, "I do not comment on clients' personal lives."

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Rihanna confirms Hartnett hookup

Rihanna has finally confirmed that she is dating actor Josh Hartnett. Although the couple has been careful to keep their relationship a quiet, a photo emerged of the pair in a liplock last month. "I've fallen for him big time," the R+B star said at the World Music Awards this weekend. "He is so hot and he is really sweet to me. When we hang out it feels right - even though it's still pretty new."

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Ashley Olsen and Lance Armstrong??!!

New couple alert? Ashley Olsen has a new, older man. The 21-year-old showed up to the Rose Bar at the Gramercy Park Hotel Monday night with Lance Armstrong, 36. A bar spy said, "They came together with a group of friends. Ashley drank red wine, sat on his lap and they were making out all night. They left together around 2 a.m." Another insider said, "Ashley and Lance settled in and within minutes, he was whispering in her ear and she was giggling like a schoolgirl. They totally looked like they were on a date."

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New love for Penelope

Penelope Cruz has a new man - Spanish actor Javier Bardem, spending a romantic few days in the Republic of Maldives earlier this month. Cruz and Bardem are longtime friends and starred together in the 1992 dramatic comedy Jamon, Jamon. They began dating after reunited on the set of Woody Allen's as-yet-untitled Spanish project.

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New beau for Cameron?

Cameron Diaz and her latest rumored fling, actor Bradley Cooper, reportedly spent a romantic weekend together in New York. They dined at Asia de Cuba at Morgan's Hotel on Saturday night and then hit the SNL afterparty at Primehouse on Park Avenue South. One onlooker said the twosome "were very close and lovey. Something is definitely going on, and it's clear they are more than just friends." The pair were also spotted on the sidelines at the Giants game on Sunday, along with Demi Moore and Ashton Kutcher. Cooper is recently divorced after a brief marriage to Jennifer Esposito.

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New couple alert: John Mayer and Minka Kelly

John Mayer is making some serious rounds in the celebrity dating pool. He and new galpal Minka Kelly of Friday Night Lights proved their couple status this weekend with a few hand-holding photo ops.

Clooney's new girl

George Clooney's new girlfriend made her public debut as his date at the Venice and Deauville film festivals. A source close to the actor says 28-year-old Sarah Larson is getting the thumbs-up from his pals. "She's really nice and generally liked by George's friends," said the source. Clooney "couldn't keep his hands off her" at Venice's Hotel Cipriani, site of the afterparty for his flick Michael Clayton, according to an observer. "At one point he just leaned over and kissed her on the lips," said a fellow partygoer. "My god, she is stunning." Larson, a one-time Fear Factor winner, works as a cocktail waitress at Las Vegas's Moon nightclub in the Palms Casino Resort, where Ocean's Thirteen had its premiere June 6. The pair have reportedly been inseparable since Larson flew to France with Clooney on September 1 for the Deauville film fest.

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Drew's new guy?

Drew Barrymore has reportedly moved on from director Spike Jonze - with her future co-star (in He's Just Not that Into You) and the "Mac" guy Justin Long. After the new couple were spotted cuddling in a party in LA on August 25 and kissing three days later during dinner with friends, Barrymore and Long partied with Cameron Diaz in Vegas on Sunday night. "It was hot and heavy," says an onlooker. "They were all over each other!"

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Cameron and John have another date

Cameron Diaz and John Mayer added fuel to the rumors that they are a couple this weekend, with outings in NYC. The pair were reportedly "all over each other" and "super flirty" at the Bowery Hotel on Friday night. Sitting together on a couch in the back of the patio, Diaz and Mayer "were laughing and talking a lot," said an onlooker. Asked if the pair are dating, a source close to Mayer said, "Yes, it's definitely true." Reps for both celebs had no comment.

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New couple? John and Cameron's night out

John Mayer seems to have rebounded from his last celebrity breakup - and moved on to another. Mayer was spotted out in NYC last night with Cameron Diaz. "They went out to several places... It was the two of them, getting to know each other, out on the town," says a source. Diaz is in New York filming What Happens in Vegas, and has reportedly known Mayer casually for a while. "This was technically not their first time hanging out...they've hung out together with friends before. But this was the first time together like this. It's new and developing...but they really like each other and it went well," said the source. Reps for both stars have not commented.

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Hilary steps out with hockey hunk

Who's Hilary Duff's new guy? The With Love singer was spotted getting cozy with New York Islanders hockey player Mike Comrie at Giorgio Baldi restaurant in Santa Monica last night. According to TMZ, the pair first hooked up while jet skiing in Idaho.

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Colin goes public with his new gal

Irish actor Colin Farrell and his girlfriend of six months, 22-year-old Muireann McDonnell, gave a show to fellow bathers at a Vegas hotel pool last weekend. The PDA-friendly couple were spotted dining at Morton's steakhouse and taking in a few Cirque de Soleil shows in addition to soaking up the rays. Farrell met the Dublin medical student last December, and sadly, according to Irish media reports, her ex-boyfriend committed suicide after learning about the relationship.

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Tommy Lee hooks up with aged rocker's daughter

New couple alert: Tommy Lee and Kimberley Stewart have reportedly hooked up. The Motley Crue rocker met Stewart, daughter of Rod Stewart, several months ago in London and the two are now an item. At last week's Pink Taco restaurant launch in LA, Stewart was seen running out to Lee when he was denied entry after the party was shut down by the fire department. "They threw their arms around each other and she started saying, 'Baby, baby' before kissing and leaving," said a witness.

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Justin + Jess: it's love

Love is in the air for new couple Justin Timberlake and Jessica Biel. Just for months after his split with Cameron Diaz, Timberlake is reportedly "in love" with the Illusionist actress. "She's the coolest chick ever. He wants to be with her all the time. He's ready to be serious," says a source close to the SexyBack singer. The pair were recently spotted getting cozy at a Manchester hotel.

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New love for Natalie?

Natalie Portman is rumored to be dating Saturday Night Live funnyman Andy Samberg. Portman first met Samberg when she hosted SNL in March 2006, but the two only began dating recently after Portman split with her on-again/off-again beau Gael Garcia Bernal. "If Andy is dating Natalie, I'm extremely jealous," one of Samberg's castmates said. A source close to the Goya's Ghost actress says, "A nice Jewish boy would be good for her."

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