Baz Luhrmann's thrillingly untamed jukebox musical was never likely to win big at Cannes. As the festival opener, its job was principally to start the party in high style, while the predictably divided reviews didn't advance the case of a film that was surely too gleefully gaudy, too unashamedly pop in its sensibilities, to win over a festival jury, particularly one headed by as sober a figure as Liv Ullmann. Nanni Moretti's tasteful grieving-family drama "The Son's Room" was a predictably respectable winner of the top prize, but it's "Rouge" (alongside "Mulholland Drive," pawned off with a shared Best Director award) that carries more cultural clout these days.