Cate Blanchett walking through the slush with sons Dashiell and Roman after a trip to Barnes & Noble ... A bundled-up Catherine Zeta-Jones walking her dog on Central Park West on Sunday ... Jessica Simpson getting out of an SUV yesterday and later shopping in Midtown with her mom ... Maggie Gyllenhaal arriving at the Late Show with Dave Letterman ... Britney Spears leaving Townhouse Spa on West 56th Street on Sunday and catching a flight at JFK yesterday ... Race driver Jeff Gordon talking a walk ... Eva Mendes eating dinner at Locanda Verde on Greenwich Street on Friday evening ... and Ashlee Simpson attending a performance of Shrek the Musical on Friday, and walking around downtown on Sunday.