1. Uncharted Territory: DJ BL3ND Takes Top Spot, Diggy Simmons Climbs, Gackt Debuts

    April 01, 2011 1:56 PM EDT This week marks the debut of Billboard Pro , Billboard's new website and service for emerging and independent artists. Billboard Pro members are able to track the online metrics that comprise their Heat Score, which is the formula that drives Billboard Uncharted. Visit the site to learn…