Cannes International Film Festival. The Riviera's cultural calendar is splashy and star-studded, and never more so than during the International Film Festival in May. The film screenings are not open to the public, so unless you have a pass, your stargazing will be on the streets or in restaurants (though if you hang around the back exits of the big hotels around 7 pm, you may bump into a few celebs on their way to the red carpet).Cinéma de la Plage shows Cannes Classics and Out of Competition films free at Macé beach at 8:30 pm. In addition, the Cannes Cinéphiles (www.cannes-cinema.com) is a group of public screenings of competition films. You can apply online in February. Cannes. www.festival-cannes.com.