Anthony "Romeo" Santos (born July 21, 1981) is an American singer, featured composer and lead singer of the Bachata group Aventura. As a member of Aventura, Santos has been a key figure in popularizing Bachata, with hits reaching near the top of the Billboard Latin charts and the top of charts in Europe. In 2002, the band's song "Obsesión" was number one in Italy for sixteen consecutive weeks.
Santos was born in The Bronx, New York, United States to a Dominican father and a Puerto Rican mother. At twelve years of age, he became a member of the church choir. His soulful voice has played a key role in the group's success. While the group performs in both English and Spanish, their work was widely ignored by much of the English-speaking 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.