Scarlett Johansson walking to the gym with Ryan Reynolds in Midtown ... Naomi Watts and Liev Schreiber sitting on a stoop in SoHo ... Kate Hudson driving a car ... Sienna Miller walking her dog on Prince Street ... Jon Gosselin shopping in SoHo ... Hugh Jackman getting in an SUV with his wife and kids (and later picking pumpkins in Connecticut) ... Shia LaBeouf hanging out on the set of Wall Street 2 ... Matt Damon walking to the set of The Adjustment Bureau near Rockefeller Center ... Mary Louise Parker hugging new boyfriend Charlie Mars on the sidewalk ... and Whitney Port walking by herself in the East Village.