Aventura lead singer Romeo Santos went solo in 2011 with the release of Formula, Vol. 1. "You," the album's first single, spent seven weeks at No. 1 on Billboard's Hot Latin Songs chart and topped the Latin digital download chart. "You" is about a man who falls in love with a woman he can't resist. In Spanish, Santos croons about his lady being the ultimate aphrodisiac and a "15 on a scale from 1 to 10." "Romeo has crossed over without singing in English," says Sony U.S. Latin president Ruben Leyva. "He's been able to do what other artists have been able to do-reach a dominant-English-speaking audience-only by singing in Spanish."