In these dreary times of belt-tightening and austerity, you'd be forgiven for not keeping track of which ridiculously expensive champagne is currently de rigueur among rappers and jet setters. But it is our solemn duty to report that since Jay-Z's famous boycott of Cristal—which was triggered by the company's dismay over the hip hop community's association with the brand and led to a decline in sales—the bubbly that seems to have taken its place, Armand de Brignac, is doing better than ever.