Cityfile: New York's Most Notable and Influential

Happy Birthday | Sean Lennon turns 34 today. Sharon Osbourne is turning 57. Newly retired pro golfer Annika Sörenstam is 39. Former Senator Trent Lott is turning 68. Director Guillermo del Toro turns 45. Tony Shalhoub is 56. Jackson Browne is 61. John O'Hurley of Seinfeld and Dancing with the Stars is 55. Actor Brandon Routh is turning 30. C-SPAN founder Brian Lamb is 68. Singer-songwriter P.J. Harvey is 40. And Randy Spelling—son of Aaron and Candy and brother of Tori—turns 31 today. A few weekend birthdays are below.More

• Madonna fell off a horse while riding at photographer Steven Klein's house in Bridgehampton on Saturday. She wasn't seriously injured, but don't think for a minute she's taking any blame for the spill. Her flack blamed the accident on a rogue paparazzo who jumped out of the bushes and startled the horse, although both the photographer in question and the police don't share that account. [NYDN, NYP, E!]
• Uma Thurman and Arpad Busson were rumored to be getting hitched in the Bahamas on Saturday, although there's still no word on whether any ceremony actually took place. [People, UPI]
• Has Lindsay Lohan gone straight? She was spotted "flirting relentlessly" with a group of guys including Leonardo DiCaprio at a club last week. [Sun]
• Rumor has it Naomi Campbell is thinking of moving to Moscow so she can be closer to boyfriend Vladislav Doronin. Say it isn't so! [DS] More

Spotted | Harvey Weinstein leaving the Waverly Inn with Blake Lively and Penn Badgley ... Hugh Jackman buying art supplies at Blick on Bond Street ... Jennifer Aniston getting in an SUV ... Philip Seymour Hoffman smoking a cigarette in the Village ... Vanessa Williams filming scenes for Ugly Betty on the Lower East Side ... Diane Kruger walking downtown ... Mariska Hargitay standing on the Law & Order set ... U2's The Edge walking with his wife, Morleigh Steinberg ... Celine Dion getting in an SUV outside her hotel ... Mario Lopez grabbing a taxi in front of Rockefeller Center ... and Kirsten Dunst watching a Rangers game at Madison Square Garden.

Spotted | Gwyneth Paltrow arriving at JFK with her kids, Apple and Moses ... Michelle Williams getting coffee in Brooklyn with daughter Matilda ... Jessica Szohr eating on the set of Gossip Girl in Astoria ... Katie Holmes carrying Suri in Central Park ... Selena Gomez talking to fans outside CBS studios in Midtown ... Sarah Jessica Parker and son James leaving their West Village townhouse ... Mario Lopez bowling ... Liza Minnelli rehearsing for her upcoming show at a studio in Chelsea ... and Kate Bosworth leaving the Beatrice Inn.

Happy Birthday | Lift up your beer and make a toast: Mr. Mario Lopez is 35 today. Others celebrating on this Friday: Jets quarterback Brett Favre is 39. At the New York Times, Stefano Tonchi is 49 and Adam Nagourney is 54. Socialite Celerie Kemble turns 35. Artist Banks Violette turns 35. Cornell's Antonio Gotto Jr. is 73. Paper's Mickey Boardman is 42. And David Lee Roth is 54. Weekend birthdays after the jump. More

• It looks like Pat O'Brien might be back off the wagon following his email rant about Lara Spencer to the staffs of both The Insider and ET. [R&M, P6]
• Aubrey O'Day and Joe Francis were spotted making out at a VMA party, and now some suspect they may be a couple. [P6]
• Thieves broke into Kate Moss' Range Rover in London, but all they took was cash and a box of chocolates. [Mirror]
• It looks like on-again/off-again couple Leonardo DiCaprio and Bar Refaeli are now on the outs, although who knows for how long. [R&M]
• Not only is Bristol Palin a pregnant teen, but she might be a boyfriend-stealer, too. [Extra]
• Some of Celine Dion's demands on tour: A dentist, a physiotherapist, 11 bodyguards, and a dressing room stocked with Bavarian figs and French cherries. [Mirror]

Good News | Here's some news that will brighten your day and distract from all that talk about how great or not-so-great Sarah Palin's speech was last night: Mario Lopez has been earned the coveted "2008 Male Celebrity Smile of the Year" award from Dear Doctor: Dentistry & Oral Health magazine. [BWE]

• Kyle MacLachlan and Desiree Gruber are officially parents. The Desperate Housewives actor and Project Runway executive producer had a son named Callum Lyon MacLachlan on Friday. [Us]
• Amy Winehouse is out of the hospital in London, after reportedly having a seizure. Her reps say the episode was caused by a bad reaction to a new medication. [People]
• Lindsay Lohan denies she got hit by a bike this weekend, but hasn't explained why she went to the hospital. Also, she and Sam Ronson got locked in their room at the Bowery Hotel on Sunday night and had to climb out of the balcony. [R&M] 
• Life on the B-list: George Michael's private jet was stuck on the runway at Teterboro on Sunday, while Sting and Bruce Springsteen's planes got to take off first. [Page Six]

Spottings | Jay-Z chatting on his phone while getting into a car outside his Tribeca building ... Ethan Hawke and Ryan Shawnhughes pushing their newborn, Clementine, through the Village ... Sheryl Crow playing with son Wyatt on a downtown sidewalk ... Mario Lopez hailing a cab in Chelsea ... Rachel Weisz and Darren Aronofsky on the set of a Vogue photo shoot in the East Village ... Jessica Simpson shopping at Bergdorf Goodman ...  Blake Lively and Leighton Meester shooting scenes for Gossip Girl in Brooklyn ... Keri Russell taking a stroll through SoHo ... Kirsten Dunst and Agyness Deyn at a concert at McCarren Park Pool ... Sam and Charlotte Ronson leaving the Bowery Hotel with Lindsay, Dina and Ali Lohan.

• Ashley Dupre's reps, who have been negotiating deals on her behalf, say she's interested in "journalism and lounge singing," and that she "sees herself as a kind of Dr. Phil." Appropriately, the $2 million TV offer she's considering would team her up with the producer to reunited Joey Buttafuoco and Amy Fisher.  [NYP]
• Ivana Trump fell off a banquette at Denise Rich's big party in St. Tropez last week and had to be carried off the boat by husband Rossano Rubicondi. [Page Six]
• Silda and Eliot Spitzer were spotted having dinner last week and "made two seconds of eye contact during dinner." [Page Six]
• Indiana Jones actor Shia LaBeouf was arrested for drunk driving on Sunday. [NYDN]