Madonna and son David arriving at the Kabbalah Center on Saturday ... Jessica Biel leaving a nail salon ... Russell Simmons sitting on a bench with girlfriend Julie Henderson on Main Street in East Hampton ... Victoria Beckham arriving at JFK ... Rachel Bilson shopping in Soho ... Orlando Bloom and Miranda Kerr hailing a cab ... Harvey Keitel playing around with son Roman ... Ciara getting out of an SUV in Times Square ... Jessica Alba taking part in Revlon's Run/Walk event in Central Park, and later pushing baby Honor in a stroller downtown ... Ryan Gosling shooting scenes for his new movie, Blue Valentine ... ... Karen Duffy standing in Times Square ... Lady Gaga arriving in NYC last Friday ... and Liv Tyler leaving a party at the Gramercy Park Hotel.