FILE: Cruz, Bardem and other couples collaborating at Cannes Movie magic often has real-life love stories behind it, but star couples at Cannes say you must tread carefully when mixing work and romance. This year Spanish Oscar winners Penelope Cruz and Javier Bardem are the smouldering A-list pair on the Cannes red carpet, China's Zhao Tao appears in a film from her spouse, director Jia Zhangke, and Egypitan director A.B. Shawky gives a presser alongside his partner and the producer of his debut feature "Yomeddine", Dina Emam. IMAGES