Cityfile: New York's Most Notable and Influential

Happy Birthday | Sacha Baron Cohen turns 38 today. Ashanti is turning 29. Paul Simon is 68. Kelly Preston is turning 47. Kate Walsh of Grey's Anatomy and Private Practice is 42. Model Beverly Johnson is 57. Ivan Bart, the head of IMG Models, is turning 46. Billionaire Tom Tisch turns 55. Mega art dealer William Acquavella is 72. Sammy Hagar of Van Halen is 62. Access Hollywood's Billy Bush is turning 38. George Bush's former spokesman, Ari Fleischer, is 49. Marie Osmond is 50. Retired NFL star Jerry Rice is 47. Serena Altschul, the former MTV VJ and CBS News correspondent, is 39. Margaret Thatcher is 84. And Donald Trump's least famous child, Tiffany Trump, celebrates her 16th birthday today. 

• Mischa Barton went to see "Tosca" at the Metropolitan Opera the other night. Naturally, when she showed up and saw a red carpet, she started walking it... until she realized it was for the screening of Michael Moore's new documentary at Alice Tully Hall. It was then that the light bulb went on and she ran across the street. Pull it together, woman! [P6]
• Jessica Simpson can't catch a break. Tony Romo ditched her; her dog got snatched by a coyote; her friends keep dishing to the media; and now her ex, Nick Lachey, appears to be reuniting with his ex, Vanessa Minnillo. Poor Jess. [E!]
• Tyra Banks appeared on Larry King Live last night and talked about how she dealt with packing on some lbs (again), her real hair (again), and how she loves being naked (unless the lighting in the dressing room sucks). [CNN, ET]More

Spotted | John Mayer leaving a Krav Maga session on West 22nd Street ... Sarah Jessica Parker and Caroline Kennedy making a promotional appearance at the Barnes & Nobles in Tribeca ... Alex Rodriguez having lunch outside at Bar Pitti ... Katie Holmes signing autographs outside the Schoenfeld Theatre ... Madonna and son David walking into the Kabbalah Center ... Sandra Bernhard leaving the center with her daughter hours later ... Kate Walsh and Barry Sonnenfeld outside the Letterman show ... Britney Spears heading inside Soho House  ... and Jay-Z standing on the sidewalk in the West Village.