Fortunately for this sentimental coming-of-age story based on the young-adult novel by Ann Brashares and directed by Ken Kwapis, its target audience is youthful enough that the cliches may still retain a hint of freshness. Four lifelong best friends who've always supported each other are preparing to spend their first summer apart. Shy, lovely Lena (Alexis Bledel) is heading off to her grandparents' house in Greece. Spirited Carmen (America Ferrera) looks forward to spending time with the father she rarely sees. Athletic Bridget (Blake Lively), still reeling from her mother's recent death, intends to purge her unruly emotions at a Mexican soccer camp. Only rebellious...