 Rivas composed for the popular show "Sesame Street" for singers as diverse as Celia Cruz, Gloria Estefan and Cyndi Lauper sharing two Emmy award wins with the Music team in 1994 and 1995.He also received an Emmy nomination for Music Composition and Direction in 1997.He was the composer along with Lyricist Nancy Sans of the song "Mambo I,I,I" sung by Gloria Estefan on the Grammy Award winning best Children's Album 1999 - "Elmopalooza!