Cannes would make anyone feel amorous. The swaying palm trees! The Champagne! The never-ending parade of sparkle-swathed cleavage! It's a miracle red carpets don't devolve into giant diamond-fueled orgies. But celebrities are here to do a job, so they must make do with PG-rated embraces suitable for the cameras. While some make-outs are clearly for display (Paris Hilton and River Viiperi, for example), others are awkward enough to seem genuinely spontaneous — see Keith Urban's wandering hands, and Marion Cotillard's phone call interruption. Click through our slideshow to see famous people so overcome with joy that they can't help but grab hold of their nearest loved one.