After leaving El Gran Combo, he enjoyed considerable success on an international scale with his own orchestra,[1] touring Latin America and the United States several times.

In April 2006, he released a new album titled Salsatón - Salsa con Reggaetón, which was produced by Sergio George and featured reggaeton rappers Daddy Yankee, Julio Voltio, La Sista, and John Eric.

In 2007, he filmed various television advertisements on nutrition for the Puerto Rico Department of Family Affairs (including one in which he sang a rhumba to a dancing carrot).

Montañez was selected to form part of a benefit concert titled “Somos Haití”, where funds would be gathered to support Haiti after the 2008 hurricane season.

Andy Jr. Harold, and Lisa have gone on to become salsa singers and have worked with their father for over 25 years, occasionally serving as back-up vocalists at his concerts.