Romeo Santos is a singer-songwriter and former member of Aventura. He served as the group's main songwriter during the band's career, penning such hit songs as "Por un Segundo," "Dile al Amor" and "Obsesion." Santos went solo in 2011, releasing Formula, Vol. 1. The album was certified triple platinum and was nominated for a Grammy Award. His follow-up, Formula, Vol. 2, was released earlier this year and debuted at No. 5 on the Billboard 200 albums chart.