Bachata icon Juan Luis Guerra scored this year with a pop and tropical smash. “La Llave de Mi Corazon,” a quirky bilingual tune that starts off about an online romance, spent four weeks at No. 1 on Hot Latin Songs. The song is the title track to Guerra’s first EMI Televisa album. “I started with blues, and on top of that I started hearing mambo riffs,” says Guerra, who spent more than three months on the song.