Meg Ryan and Nora Ephron leaving Esca after having lunch on Friday ... Marc Jacobs and Lorenzo Martone walking in the West Village ... Celine Dion and Rene Angelil leaving their hotel en route to lunch at Da Tommaso on Eighth Avenue ... Alex Rodriguez walking in Midtown ... Jessica Stam hanging with boyfriend Austin Cregg and friends downtown ... Shia LaBeouf listening to music on the set of Wall Street 2 ... Nicole Kidman getting out of a car with daughter ... Taylor Momsen walking to the set of Gossip Girl ... James Gandolfini signing autographs outside the Bernard Jacobs Theatre ... Ruben Studdard arriving at JFK ... Liev Schreiber and Naomi Watts pushing son Samuel in a stroller ... and Sienna Miller getting out of a cab.