Dear Sam, "The Emancipation of Mimi" has been certified by the RIAA 6xPlatinum, not 5 as you say.

Anyway, "Migrate" hasn't been confirmed as the leading single already. And if we follow "The Emancipation" logic we already have to hear two tracks until the def single comes out, remmeber how "Say Somethin'" and "Mine Again" were tentative first singles but they didn't quite work. At this moment there have been so many rumours I'll believe it when I hear it.
Happy New year and congrats for your great blog