Kate Winslet walking in the meatpacking district with her son ... Donna Karan eating lunch outside with a friend in SoHo ... Jon Stewart walking with his wife and son in Tribeca ... Mischa Barton running errands with her dog ... Brad Pitt with son Maddox catching a flight at JFK ... Will Ferrell and Mark Wahlberg shooting scenes for The Other Guys in Chinatown ... Gerard Butler walking downtown ... David Byrne riding his bike near the West Side Highway ... Model Kara Young walking home from the gym in the West Village ... Sarah Jessica Parker leaving the Serge Normant Hair Salon in the meatpacking district, and later arriving at Barbra Streisand's performance at the Village Vanguard ... Clive Owen walking with a friend in SoHo ... and Jay-Z leaving dinner with a bunch of bodyguards.