John McEnroe jogging on Central Park West ... Peter Dinklage walking his dog in the West Village ... Madonna arriving at JFK ... Keri Russell carrying son River downtown ... John Lithgow leaving his apartment ... Jessica Szohr on the set of Gossip Girl in Brooklyn ... Ashlee Simpson arriving at the Ambassador Theater for a performance of Chicago ... and Jersey Shore's J-Woww posing for photos inside GLO nightclub on Long Island.