Amazon.com, Inc. founder Jeff Bezos and his fiancée, Emmy-winning journalist Lauren Sánchez, celebrated their engagement with a lavish evening in Cannes, France, according to a new report. What Happened: Bezos, 59, and Sánchez, 53, marked their engagement at La Petite Maison in Cannes, France, on May 22. The couple was joined by Bezos’ sister, Christina Bezos Poore, and her husband, Steve Poore. The group enjoyed zucchini blossoms with parmesan cheese and a €4,000 (about $4,285) bottle of Dugat-Py Grand Cru from Domaine Bernard, a small batch red Burgundy wine. The restaurant, known for its la…