Attending a party, a young Manhattan executive with nothing but good luck (Lindsay Lohan) meets a young janitor with nothing but bad (Chris Pine), and when they kiss, they involuntarily exchange fortunes. Whimsical fantasy tends to work best when its premise is used sparingly, but in this case the fantasy element takes over the story, becoming mechanical and often confused (for instance, simple clumsiness is often conflated with bad luck). No less than five people are credited with the pile-driver script, but the two leads hold up the picture and the New York locations are nicely used. Daniel Petrie directed. PG-13, 108 min. (JR)