Máximo Antonio del Rosario (born November 3, 1955), known as Toño Rosario is a merengue singer well-known in his native Dominican Republic and Latin America. He is often mocked (even by himself) for his "ugly" looks and he even adopted the nickname "El Cuco" (The Boogeyman).

Rosario was born in Higuey, a province in the Dominican Republic. Since childhood, he and his brothers showed interest in music, even playing self-created instruments like bottle caps, plastic containers, and others. Soon they started singing and playing in the neighbourhood and started what would later be known as Los Hermanos Rosario with whom he enjoyed great success later.

In the late 80s, after 12 years with his brothers, Toño decided to abandon the group and started his own solo career. He debuted April 14, 1990 in the Roberto Clemente Coliseum of Puerto Rico. He went on to become one of the most popular merengue singers with some of his albums reaching platinum status.

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