As a publicity stunt, a pop superstar (Emmanuelle Seigner) turns up at the small-town home of an obsessive teenage fan (Isild Le Besco) and the girl responds by fleeing to her room. Soon afterward she runs away from home and manages to get taken in by her idol as a kind of resident groupie and gofer sent to reclaim the star’s clothes from her estranged boyfriend. But what starts out as a kind of edgy variant of The King of Comedy devolves into something closer to All About Eve in cowriter and director Emanuelle Bercot’s hands. The limiting factor, despite serious performances by the two leads, is that neither character is entirely believable; the star’s imagined as a standard-issue diva, while the fan oscillates a bit too neatly for my taste between hysteric and conniver. In French with subtitles. 115 min. (JR)