As David Letterman joked to Jay-Z about getting married on his show last night (previously recorded), in real-time the rapper was partying in Tribeca, possibly in celebration of his wedding. While there's no confirmation, all signs point to he and Beyoncé finally tying the knot -- something that has been speculated they would do all week. People points out that the alleged bride, Beyoncé Knowles, told Cosmo in 2006, "I never pictured myself as a......