Need a way to keep track of the intricate bird's nest that is CMJ? Stay on top of the conversation with the Pepsi Music Index. We picked 100 emerging acts, and in return, Pepsi gave us a program which ranks them in real-time according to your tweets, status updates and blog posts. How does it work? Something about a “proprietary algorithm” that we don’t understand. Each artist gets a popularity score, trend score and general score. It's like high school all over again, but more fun to fiddle with. Who will rise to the top of CMJ and end up the most triumphant bubble? It's up to you to decide. Kendrick Lamar is #1 today—check the Index throughout the week, see who’s getting talked about most and know who’s next before your friends.