It's a big day at the Cannes Film Festival. Marion Cotillard stars in "Karma", the new psychological thriller from her former partner Guillaume Canet – their first film together since the couple split, and their ninth collaboration overall. Cotillard plays a woman whose life collapses when her young godson mysteriously disappears. Also on the Croisette is John Travolta presenting his directorial debut "Propeller One-Way Night Coach to Los Angeles", based on a children's novel he wrote for his ow