Halle Berry walking downtown with a friend yesterday ... a grumpy-looking Ron Perelman leaving Bar Pitti on Sunday... Alex Rodriguez walking to lunch at Da Silvano ... Mary-Kate Olsen getting coffee with Nate Lowman in Tribeca ... Phoebe Cates getting breakfast with a friend yesterday at Yura on Madison Avenue ... Nicole Kidman walking on Park Avenue ... Naomi Watts shopping at Lilliput on Lafayette Street ... Chaz Bono arriving at JFK ... Julianne Moore and Bart Freundlich walking with their daughter and dog in the West Village ... Taylor Momsen filming scenes for Gossip Girl ... Hugh Jackman bowling with his kids at Lucky Strike on Sunday alongside Vincent D'Onofrio and his son ... Luke Wilson leaving Nello's on Sunday with a lady friend ... Heidi Montag and Spencer Pratt arriving at JFK ... and Keith Urban leaving his apartment building with his daughter.