[That's "Gossip Girls" Lehigh Mister and Blork Liverly filming outside the Met yesterday; image via Bauer-Griffin]

Blake Lively and Leighton Meester walking down Prince Street yesterday where they were filming scenes for Gossip Girl ... Hugh Jackman playing with daughter Ava at a playground in the West Village ... Nicole Kidman and Keith Urban leaving their downtown apartment separately ... Vanessa Williams walking in Midtown ... Daniel Radcliffe signing autographs for fans on his way into Regis and Kelly ... Naomi Watts carrying shopping bags in NoHo ... Kate Mara filming scenes for Happy Thank You More Please downtown ... Kat Von D arriving at MTV's studio in Times Square ... Penn Badgley standing on the sidewalk in Midtown ... and J.K. Rowling leaving Monkey Bar on East 54th.

[Leighton Meester and Ed Westwick on the set of "Gossip Girl"; image via INF]

Robert Pattinson riding a bike around Central Park on the set of Remember Me, and later standing with co-star Emilie de Ravin ... Shaquille O'Neal leaving his hotel in Midtown ... Mariah Carey filming the music video for her latest single, "Obsessed," including one scene with her dressed up dressed up as Eminem ... Leighton Meester, Chace Crawford, and Ed Westwick on the set of Gossip Girl ... and Rihanna walking into lunch yesterday at Philippe, and then turning up at the Gramercy Park Hotel last night for Allegra Versace's 23rd birthday party.

Anna Kournikova viciously brawls with another woman in a Vegas club, Leighton Meester sings and acts in a video for Cobra Starship, Michael Jackson looked frail on stage at his concert rehearsals and Chris Brown gets shut down by Jay-Z.

[Leighton Meester arriving on set to for her first day of "Gossip Girl" season three shooting; image via Bauer-Griffin]

Planned Parenthood is mailing condoms to college kids in their welcome packets, which would be totally passé in developed regions of the country. But this was in Missouri!

["Gossip Girl" actress Leighton Meester leaving an interview in New York; image via Splash]

The infamous Vogue editrix loses her party planner, House as a tranny-nun, Governator Ahnold's real-life action sequence, a sad Hollywood divorce, midgets, gays, nerdy Jews, scary Americans, more Gossip Girl action, and Gary Busey. Presenting your Saturday morning Gossip Roundup:

Someone is shopping a tape of Leighton Meester boning an ex-boyfriend, Robert Pattinson gets hit by a cab, Jennifer Garner tries to breakup Ben Affleck and Kevin Smith, Susan Boyle goes bonkers again and Beyonce screws over a club owner.

• The owner of M2, the club formerly known as Crobar and Mansion, says he may sue Beyoncé now that she appears to be backing out of a deal to perform at the club for $200K. [P6]
• It's been nearly 10 months since Jeremy Piven put a deadly piece of fish in his mouth and the sudden onset of mercury poisoning forced him to drop out of a Broadway show and seek medical treatment. He's feeling much, much better now, he'd like you to know. And he's still sticking to that fishy story about fish, evidently. [People]
• During a recent concert in Manchester recently, Britney Spears shouted out, "What's up, London," a line that did not go over well with the crowd. [Sun]
• Jennifer Love Hewitt is writing a relationship advice book. The secret to landing sweet, charming men like Carson Daly and John Mayer: coming soon to bookstores everywhere! [People]

Gawker: Live, From Vegas! continues unabated through the night (so stick around!). Next on deck, another special guest for this hot, inaugural summer weekend: music writer extraordinaire and Idolator editor Maura Johnston. Maura, kick out the jams, please:

["Gossip Girl" Leighton Meester films "The Roommates" with Minka Kelly from "Friday Night Lights" in Los Angeles; image via Splash]

• Are Michelle Williams and Spike Jonze planning to head down the aisle this summer? That's what the Star claims, since the two have been together "almost a year" and supposedly "don't see why they should wait much longer." As good a reason as any! [Star]
• Sam Ronson changed her relationship status on Facebook to "It's complicated," and says she and LiLo have started talking again, which may mean they're getting back together. [Us]
• Mary-Kate Olsen "kept touching" actor Bradley Cooper at a Tribeca Film Festival party, which could be a sign that they might be dating. [NYDN]
• Parker Posey showed off her new man at the festival, too. She's dating a sculptor named Scott Lenhardt. [NYM]

• The model-centric cover of the May issue of Vogue—timed to coincide with the model-centric Costume Institute Gala, of course—has been revealed. And for the third month in a row, a black woman (Liya Kebede) makes an appearance. [Style.com, The Cut]
• Oscar de la Renta appeared on The View today to try and dig himself out of the giant PR hole that followed his not-so-sweet comments about Michelle Obama in recent weeks. [Jezebel]
• Speaking of the First Lady, she's added a full-time makeup artist to her traveling entourage, just in case you happen to be keeping tabs on the White House payroll. [NYP]

Marc Jacobs has several reasons to celebrate today. In addition to his recent engagement, he'll also be blowing out 46 candles on his birthday cake today. Others marking the big day: NBC chief Jeff Zucker is 44. Hugh Hefner turns 83. Cynthia Nixon is 43. Leighton Meester is turning 23. Albert Hammond Jr. is turning 29. Joe Scarborough is 46. Porn queen Jenna Jameson is 35. Dennis Quaid turns 55. Fashion designer Martin Margiela is 52. Restaurateur Taavo Somer turns 36. Twilight actress Kristen Stewart is 19. Jesse McCartney turns 22. America's Next Top Model winner Yoanna House is 29. And former model-turned-ANTM judge Paulina Porizkova is 44.

• Paris Hilton is getting married! Well, sort of. America's original celebutard told reporters that boyfriend Doug Reinhardt is "going to be my husband," and now friends say they're planning a summer wedding in the Bahamas. These two are going to be together forever, just you wait and see. [E!]
• The Lindsay Lohan-Sam Ronson trainwreck rolls on: Ronson seems to have changed her mind and decided she no longer wants a restraining order; LiLo says she's "devastated" by the breakup and that everyone has turned on her. Now Lohan's friends say they're worried she's suicidal. [People, Us, TMZ]
• You didn't expect Michael Lohan to pass up a PR opportunity, did you? He says he's cleared his schedule and put aside his "numerous commitments" to help Lindsay through this crisis. [OK!]
• Madonna isn't taking her legal defeat in Malawi very well: Not only did she send her kids to stay with Guy Ritchie so she could "drown her sorrows" with Stella McCartney, she wore an "uncharacteristically mumsy outfit," too, which can't possibly be a good sign. [Sun, DM]

Ellen Barkin walking in the West Village ... Mario Batali having lunch with the family at Da Silvano ... Gisele Bundchen going to a photo shoot at Chelsea Piers ... Julia Roberts walking in Chinatown ... Jessica Alba leaving her Tribeca hotel with her daughter Honor ... Claire Danes carrying a shopping bag in Soho ... Leighton Meester walking in the Village ... Mickey Rourke sporting a new 'do after leaving a salon on Madison Avenue ... Jennifer Aniston standing on the set of her new movie, The Baster ... Howard Stern walking a few blocks from his apartment building ... Mary J. Blige shopping with friends at American Apparel ... and Bernadette Peters hailing a cab outside Barneys.

Michael J. Fox is working again. As is Rebecca Romijn. Sean Penn and Melissa Leo make post-Oscar plans, and a great stage vet gets a potentially good role.

Michelle Williams and Spike Jonze taking a walk in Brooklyn ... Justin Timberlake playing basketball on a public court downtown ... Howard Stern and Beth Ostrosky sitting courtside at a Knicks game at Madison Square Garden ... Julia Roberts leaving her hotel in Midtown ... Helena Christensen walking in the Village ... Beyonce shooting a video in Tribeca ... Meryl Streep reading the Times on the set of her new movie in Brooklyn ... Madonna and Jesus Luz leaving the Kabbalah Center ... Ru Paul walking in the meatpacking district ... Ice-T and Coco leaving a show at Caroline's in Times Square ... Maggie Gyllenhaal and Peter Sarsgaard arriving at the Classic Stage Company on East 13th Street ... Nelly leaving the Trump International Hotel ... Tim Robbins playing hockey in the Village ... Kiefer Sutherland leaving Kingswood in the West Village with his girlfriend, Siobhan Bonnouvrier ... Naomi Watts carrying her new baby in the meatpacking district ... and Tyra Banks leaving the Waverly Inn.