Early in the year, Billboard predicted Romeo Santos would score the top-selling Spanish-language album of 2014 with "Formula Vol. 2." After all, 2012's "Vol. 1" had the genre's top-selling debut week (62,000 copies) and was the best-selling Latin album of the year, moving more than 320,000, according to Nielsen SoundScan. A week after its Feb. 25 release, "Vol. 2" (Sony Music Latin) is already outpacing its predecessor, moving close to 100,000 copies in the week ending March 2, the best debut for a Latin album since teen pop group RBD's "Celestial" in 2006. "Vol.