Sienna Miller walking her dog ... Rihanna getting out of an SUV ... Will Ferrell jogging near Union Square ... Matt Damon filming scenes for The Adjustment Bureau with Anthony Mackie in Brooklyn ... Paul Simon walking on Madison Avenue ... Ashton Kutcher and Demi Moore leaving their hotel ... Kevin Bacon walking on 14th Street ... Bruce Willis arriving at ABC for an appearance on GMA ... Calvin Klein eating lunch outside at Sant Ambroeus in the Village ... Angie Harmon carrying her daughter on Madison Avenue ... and John Mayer leaving Gemma on the Bowery after having dinner.