Anthony "Romeo" Santos at twelve years of age, became a member of the church choir. While the group performs in both English and Spanish, their work was widely ignored by the English-language media during the early part of their career. On May 9, 2011, Santos released his first single, "You", from his upcoming solo debut album, Formula. The song became a number-one debut on the Hot Latin Songs and Tropical Songs chart. The second single revealed from his album was "Promise" which features a duet with Usher. The single has peaked at number #1 on the Hot Latin Songs chart and number one on the Tropical Songs chart.