Katherine Heigl left her NYC hotel with her Valentine, Naleigh, on Saturday. The movie star mom has been focused on another holiday, though, as she shoots New Year's Eve in the Big Apple. Katherine was a late addition to the cast and stepped in to take over for Halle Berry, who left the project to focus on her custody battle with ex Gabriel Aubry. Katherine's film is nonetheless packed with celebs, including Zac Efron, Jessica Biel, and newly single Sienna Miller. It will also reunite her with her Killers costar Ashton Kutcher. Katherine and Ashton's collaboration didn't fare too well with audiences, but he enjoyed a big box office success with his latest comedy No Strings Attached.