Shooting in New York City began on 15 July, covering areas in and around the five boroughs and on Long Island. The street where Aman and Naina live was filmed in Brooklyn, where the unit camped for two weeks in local houses. A body double was used for Zinta's jogging scene during the film's opening credits, since she had injured herself while shooting it. The Northeast blackout of 2003 forced the unit to cancel some filming. The shooting schedule in New York City lasted for fifty-two days. The final scenes, which included some songs, were filmed at the Filmistan Studios in Mumbai over about fifty days beginning in August 2003. Shooting ended in October 2003, "Maahi Ve" being the last scene filmed. According to Shah Rukh Khan, "Kal Ho Naa Ho" was made in sync sound as there were many indoor sequences in the film. He noted that sync sound "improved" his performance "considerably" describing it as "one of the biggest blessings for an actor."